Summary

Asks to borrow specimen of Pollicipes from the Chalk.

Summary

Requests JPM’s assistance by lending or giving him cirripede specimens. The anatomy of cirripedes has been most imperfectly done, and their classification is a perfect chaos.

Summary

Thanks J. D. Dana for cirripede specimens. Describes his work. Comments on Ibla. Would like to see AAG’s notes and figures on Anatifa. Asks for references to cirripede descriptions by T. A. Conrad.

Summary

CD is distressed that JS’s shipment of fossils has been lost: "of all the Cirripedes in the world, I most wish to dissect the Alepas squalicola". Welcomes JS’s offer to send some northern recent species. CD finds great confusion in the current classification of cirripedes in British museums; different genera are made into one species, mere varieties are made into distinct species. If JS would give him some named common northern species, it would be of great assistance.

Summary

Asks to borrow cirripede specimens. Describes his research.

Summary

Thanks him for specimens of Alcippe.

Comments on sketches by AH and on cirripede paper by Lovén.

Discusses Lithotrya and its burrowing habits.

Summary

Thanks RO for his note on Conchoderma hunteri [see Living Cirripedia 1: 153].

Has been very unwell; has lost four-fifths of his time. Will go to Malvern to try the water-cure for his vomiting, which regular doctors cannot cure.

Has done some pretty homological work with cirripedes.

Summary

Clarifies the notion and use of type-species and applies it to CD’s problem with Conchoderma.

Summary

Encloses a letter to be forwarded to Sven Lovén, asking for a specimen of a remarkable cirripede. Still anxious to receive JGF’s specimens.

Summary

Discusses cirripede specimens borrowed from HC.

Summary

Discusses effect of subsidence and elevation on deposits. Cites examples along coasts of South America and Wales. Proposes theory to explain thickness of deposits in south Wales.

Asks CL’s opinion of his theory of "craters of elevation" described in Volcanic islands.

Mentions CL’s comparison of Mississippi beds to the Pampas.

Comments on Poulett Scrope’s views on the separation of basalt and trachyte.

Describes his cirripede work.

Summary

Discusses the new genus, Alcippe, described by AH ["Notice of the occurrence on the British coast of a burrowing barnacle", Ann. & Mag. Nat. Hist. 2d ser. 4 (1849): 305–14]. Comments on Lithotrya, Clitia, and Anatifa. Discusses cirripede larvae. Asks which Mollusca specimens AH wishes to borrow.

Summary

HES’s letter will fructify to some extent: CD will try to be more faithful to rigid virtue and priority. Would not adopt his own notion in cirripede book without prior approval by others. Will not append "Darwin" to any of his species. Feels sure many others share his aversion.

Asks HES’s opinion on retention of generic name Conchoderma.

Summary

Thanks HES for solving his problem. Has some difficulty with HES’s type-species. In arranging genera in a natural order it is often impossible to say which species should be considered the type.

Summary

Thanks AH for specimens of Alcippe.

Discusses capacity of Lithotrya to bore its own hole. Believes Arthrobalanus also makes cavities this way.

Asks to see paper on cirripedes by Sven Lovén.

Comments on paper by AH [see 1253].

Summary

Describes his research on cirripedes.

Comments on paper by AH ["Notice of a burrowing barnacle", Ann. & Mag. Nat. Hist. 2d ser. 4 (1849): 305–14]. Asks to borrow specimens.

Summary

Discusses cirripedes collected by JDD.

Gratified that he agrees "to some extent" with CD’s views on coral reefs.

Mentions his health.

Asks for JDD’s publication on cirripedes.

Sends message from William Baird concerning Crustacea research of J. O. Westwood.

Mentions Joseph Leidy’s discovery of cirripede eyes.

Summary

To make his monograph on cirripedes complete, would appreciate a specimen of Alepas squalicola, which CD is sure is a new genus.

Summary

Has altered and added to HES’s list [compiled for Bibliographia zoologiæ et geologiæ, edited by Louis Agassiz and enlarged by HES, (1848–54)].

On zoological nomenclature CD cites a case in which he believes more harm than good would be done by following the rule of priority. Thinks the rule of the first describer’s name being attached in perpetuity to a species has been the greatest curse to natural history. Every genus of cirripedes has a half-dozen names and not one careful description.

Sends a paper he once wrote [missing] on the subject [of zoological nomenclature].

Summary

CD is obliged to put off his journey to Paris because of ill-health, but this will give CD more time to study the specimens.

Values HM-E’s opinion on CD’s barnacle work more than any man’s in Europe.