JUKES-BEO"WNE : ON POLl's GENERIC NAMES. 103 



It appears to me that all Poll's genera must be examined in this 

 manner with the object of deciding wliether they should date from 

 Poll himself or from some later author, and further I think that none 

 but the names which have already been imported into conchological 

 nomenclature should hereafter be revived, Hypogcea, for instance, has 

 not been used by any conchologist since Poll proposed it for a group of 

 animals belonging to a certain species of the Linnean genera Pholas, 

 Solen, Tellina, and Donax, and in my opinion it ought not to be revived 

 for any section or subgenus of any of these genera. 



On the other hand, if one of Poll's names has already been so used 

 it seems better to confirm its use than to burden our nomenclature 

 with another new name for the same thing. Thus Peronaa, proposed 

 by Poll to designate the animals belonging to certain other species of 

 Tellina and Donax (LinuDBUs), was employed by Mcirch for a section 

 of the shell genus Tellina^ represented by T. planata, Linn., and 

 T. nitida, Poll. He did not indicate a type, however, and so far as we 

 can ascertain the first author to designate a type for Peroncea was 

 Stoliczka in 1 87 1 ,^ that type being T.planata. In 1900 Dr. W. H. Dall, 

 who unreservedly rejects all Poll's names whether adopted by others 

 or not, proposed the name Peromelia for the same section of Tellina,' 

 with T. nitida (Poll) as the type. I can see no reason why Peroncea 

 should not be accepted from Morch with T. planata as its type, and 

 consequently think that Peronidia should be abandoned as a synonym. 



The following is a list of Poll's generic names, those which have 

 been used conchologically by subsequent authors being indicated by an 

 asterisk ; these need investigation and fixation to some particular type, 

 but the remainder should be relegated to oblivion : — 



Hypogcea. Glauciis. 



*Peroncea. Daphne. 



*Callista. Eehion. 

 *Arthemis. Peloris. 



Cerastes. Chimcera. 



*Loripes. Callitriehe. 



Limnaa. *Argus. 



Fsilopiis. *Axincea. 

 *Glossus. 



It only remains to consider what use has been made of the names 

 emploj'ed by Poll for the shelly coverings of his Molluscan genera. 

 Mcirch revived three of them — Peromeoderma for a section of Tellina, 

 DapJinoderma for a section of Area, and Cerastoderma for certain 

 species of Cardium. I think that Peronceoderma should not be used as 

 well as Peroncea for a section of Tellina ; Cerastoderma could onlj^ be 

 used for Cardium edule, Linn., and its congeners, if regarded as a separate 

 section of the genus ; Baphnoderma can also be used by anyone who 

 thinks that Area Domingensis represents a group of sufficient importance 

 to bear a sectional name. 



1 "Cretaceous Pelecypoda" in Palseont. Indica, p. 117. 



2 " Synopsis of the Family Tellinidae": Proc. U.S. Nat. Mus., vol. xxiii, p. 291 



(1900). 



