skip to content

Darwin Correspondence Project

Search Results

Darwin Correspondence Project
Search:
"Hyatt Alpheus" in search-correspondent [X]
11 Items
Sorted by:  
Page: 1

From Alpheus Hyatt   January 1877

Summary

Reports on his work. Relationships of shells found at Steinheim; attempts to elucidate the genesis of different forms.

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  Jan 1877
Classmark:  DAR 166: 357, 359
Letter no:  DCP-LETT-10760

To Alpheus Hyatt   13 February 1877

Summary

Regrets that F. Hilgendorf proved so greatly in error ["Planorbis Multiformis", Monatsber. K. Akad. Wiss. Berlin (1866): 474–504; "Noch einmal Planorbis Multiformis", Z. Dtsch. Geol. Ges. 29 (1877): 50–62].

Discusses polymorphic species.

Surprised that shell form developed from various different progenitors.

Reminds CD of C. Nägeli’s conclusions on Hieracium.

But still retains belief expressed in first edition of Origin that variation in protean species is neither advantageous nor disadvantageous.

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  13 Feb 1877
Classmark:  Maryland Historical Society (Alpheus Hyatt Papers MS 1007)
Letter no:  DCP-LETT-10842

To Alpheus Hyatt   8 May 1881

Summary

Aware that AH thinks CD has done nothing to advance the good cause of the descent theory.

Obliged for gift of AH’s [Tertiary species of Planorbis at Steinheim (1880)].

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  8 May 1881
Classmark:  Maryland Historical Society (Alpheus Hyatt Papers MS 1007)
Letter no:  DCP-LETT-13151

From Alpheus Hyatt   23 May 1881

Summary

Wishes to correct impression of his attitude towards CD’s contribution: CD has successfully explained how differences arise.

Pleased CD will read his book [Tertiary species of Planorbis at Steinheim (1880)].

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  23 May 1881
Classmark:  DAR 166: 360
Letter no:  DCP-LETT-13171

To Alpheus Hyatt   10 October [1872]

Summary

Thanks for "Embryology of the fossil cephalopods", [Bull. Mus. Comp. Zool. Harvard 3 (1872–4): 59–112].

Regrets error in attributing acceleration concept to E. D. Cope instead of to AH in last edition of Origin, and misrepresentation of their joint view.

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  10 Oct [1872]
Classmark:  Manuscripts Division, Department of Rare Books and Special Collections, Princeton University Library (Hyett and Mayer Collection)
Letter no:  DCP-LETT-8551

From Alpheus Hyatt   [late] November 1872

Summary

No need to apologise for not quoting AH’s paper on acceleration and retardation.

Agassiz introduced AH to ammonites and entrusted collection to him. Has followed developmental history of each species and placed them within geological formations. Found evolutionary history of species recapitulated only to a degree in individual development. Stages frequently skipped. Explains why young of later animals are like adults that preceded them. Retardation entirely idea of Edward Drinker Cope. Sends paper to explain it. Acceleration can explain degraded forms. Often like youthful stage with which series began. Often resemble old age of earlier series. Regularity of these series incompatible with natural selection. How can selection account for degraded final stages or for predictability of development? Franz Hilgendorf’s Paludinae from Steinheim lake show same parallelism in development. May be possible to reconcile this with selection. But Trochiformis begins to show degradation in beds where it is most numerous and has largest individuals, i.e., where selection seems to be favouring it. Will work on Steinheim shells this winter.

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  [late] Nov 1872
Classmark:  DAR 99: 48–55
Letter no:  DCP-LETT-8655

To Alpheus Hyatt   4 December [1872]

Summary

If decapod does not pass through zoea stage, is this acceleration? If hypothetical adult retained zoea characters, would this be retardation? Believes obliteration of growth stages frequently due to natural selection. Most interesting points in AH’s letter deal with senile characters. CD attributes them to laws of growth not selection. Explains degraded characters as result of readaptation to simpler conditions. Believes no innate tendency to progressive development exists.

Hopes AH visits F. Hilgendorf’s famous deposit [at Steinheim]. A. Weismann [Einfluss der Isolierung (1872)] makes good use of Hilgendorf’s observations.

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  4 Dec [1872]
Classmark:  Maryland Historical Society (Alpheus Hyatt Papers MS 1007)
Letter no:  DCP-LETT-8658

From Alpheus Hyatt   8 December 1872

Summary

Discusses his theory of acceleration and retardation of development.

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  8 Dec 1872
Classmark:  DAR 145: 365
Letter no:  DCP-LETT-8665

To Alpheus Hyatt   14 December [1872]

Summary

Sends copy of last edition of Origin.

Respecting AH’s theory that acceleration of growth produces new characters, urges AH to examine decapods that do and do not pass through zoea stage. Believes there are no marked differences between them.

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  14 Dec [1872]
Classmark:  Maryland Historical Society (Alpheus Hyatt Papers MS 1007)
Letter no:  DCP-LETT-8678

From Alpheus Hyatt   8 January [1875]

Summary

Encloses report on his paper "Old age characteristics among ammonites", [Proc. Boston Soc. Nat. Hist. 17 (1875): 236–41].

Stability of long inherited characters. Dependence of some recently acquired characters on the environment.

Author:  Alpheus Hyatt
Addressee:  Charles Robert Darwin
Date:  8 Jan [1875]
Classmark:  DAR 166: 358
Letter no:  DCP-LETT-9233

To Alpheus Hyatt   21 January [1875]

Summary

Thanks for note and extract.

Will be glad to read AH’s memoir when published [? "The Jurassic and Cretaceous Ammonites collected in South America by Prof. James Orton" Boston Soc. Nat. Hist. [Proc Mem Jnl!?] 17 (1875): 365–72].

Recalls AH’s visit to Down.

Author:  Charles Robert Darwin
Addressee:  Alpheus Hyatt
Date:  21 Jan [1875]
Classmark:  Maryland Historical Society (Alpheus Hyatt Papers MS 1007)
Letter no:  DCP-LETT-9826
Document type
letter (11)
Addressee
Correspondent
Date
1872 (5)
1875 (2)
1877 (2)
1881 (2)
letter