OF CONCHOLOQY. 231 



NOTES ON THE REMARKS OF DR. P. P. CARPENTER 

 (PtfBLISHED IN PROC, ZOOL. SOC. LOND., 1365,") ON 

 CERTAIN SPECIES OF MARINE GASTEROPODA, NAMED 

 BY W. HaRPER PEASE. 



BY W. HARPER PEASE. 



The species referred to were forwarded to London, -with many 

 others, during the year 1863, for identification, accompanied 

 with descriptions for publication, in case they should prove to be 

 new. So many years have passed by since they left me, that I 

 have detected the synonymy of a few ; and having collected 

 more perfect specimens of others, have altered their names, not 

 supposing my MSS. names would ever appear in print. 



''■ At7/s debilis, Vse., appears to be identical with A. succisa, 

 Ehr., and simply a slender var. of A. alicuJa, (? A. Ad.,) Ehr." 



The above determination was sent me several years since by 

 Mr. Cuming. I have retained my name, as the animal does not 

 agree with that of succisa, Ehr. 



The two species of Ehrenberg may be varieties of each other. 

 It is impossible to decide on species of Bullidce from the shell 

 alone. Two species of Hamiaea inhabit the Sandwich Islands, 

 the shells of which cannot be distinguished the one from the 

 other; the animals, however, are not only specifically but 

 generically distinct. The group of species represented by B. 

 ampulla, Australis, etc., cannot be separated from each other 

 without a knowledge of their animals. The one inhabiting the 

 Sandwich Islands I have described as B. marmorea. The shells 

 of genera Lopliocercus, Volvatella and CylindrohuUa resemble 

 each other so closely that they cannot in some cases be dis- 

 tinguished. 



* Reprinted ia Americaa Journal of Coucliology, ii., 379, 1866. 



