Ml'. W. Clark on the Animal of Kellia rubra. k. jo 



Tribus 8. Cryph^ace^. 



15. CrypJiaa, Brid. 



116. C. heterumalla, Hedw. Muse. Frond. 3. 1. 15 (sub iVecAera); 

 M. P. 96. 



Hab. Zo_i corticicola per Pyrenseos humiliores. 



[To be continued.] 



XXXIV. — Observations on the Animal of Kellia rubra, brj Wil- 

 liam Clark, Esq., in a Letter to Professor Edward Forbes. 



To Richard Taylor, Esq. 

 Dear Sir, 



The interesting letter I herewith send you relates to the curious 

 little bivalve mollusk Kellia rubra, upon the animal of which 

 some important observations were communicated by Mr. Alder 

 to the number of the ' Annals '^for September last. In the 15th 

 part of the ' History of British Mollusca,' by Mr. Hanley and 

 myself, full use is made of Mr. Alder^s notes, and also of valu- 

 able manuscript notes on the KellicB kindly communicated to us 

 by Mr. Clark. The discrepancies between the statements of dif- 

 ferent observers as detailed in our work have induced Mr. Clark 

 to turn his immediate attention to the subject, and the results 

 are contained in the following letter. Their value is such that I 

 grudge the delaying of the communication of them to the public 

 until the conclusion of the ' History,^ when we mean to add 

 abundant new matter in supplementary notes. 



I need scarcely say that the statements of Mr. Clark go towards 

 confirming the union of Recluz's genus Poronia with Kellia, the 

 view taken in the ' History of British MoUusca.^ M. Deshayes's 

 drawing of the animal of Kellia Geoffro7/i (in the Mollusques 

 d'Algerie) exhibits the same conformation of tube observed by 

 Mr. Alder first and since by Mr. Clark in Kellia 7-ubra. 



Most truly yours, 



Edward Forbes. 



7 Norfolk Crescent, Bath, 

 My dear Sir, 7th March, I84y. 



It gives me pleasure to have it in my power to send you what 

 I think is a correct account of the malacology of Kellia rubra. 



After I had written to you on the 4th instant, I became dis- 

 satisfied, and I determined to make an attempt at once to settle 

 the point, as to the tube of Kellia rubra being open underneath 

 or otherwise ; for which purpose I wrote to a friend to obtain 

 from certain rocks, four miles from Exmouth, a parcel of Fucus 



