45 



PROPOSED NEW NAME FOR CEPOLIS TRIZONALIS, auct., 

 NON GRAT. 



By Hugh C. Fulton. 



Read IQth January, 1908. 



Cepolis definita, n.n. 



Helix trizonalis, Pfr., no7i Grateloup : Conchyl. Cab., Helix, Theil ii, 



p. 474, pi. clviii, figs. 12-15. 

 n. trizo7ialis, Rve , non Grat. : Concli. Icon., vol. vii, figs. 592«, h. 

 H. {Cepolis) trizonalis, Pils. : Man. of Conch., vol. v, p. 93, pi. xlix, 



figs. 68-70. 



This well-known shell, which has been described and figured several 

 times as H. trizonalis, Grat., and occurs in most collections under that 

 name, bears in coloi'ation and general form a close likeness to that 

 species, but can easily be distinguished from it by its larger size and 

 much finer sculpture. The oblique striae are scarcely seen without a lens, 

 whereas in trizonalis they are coai^se and conspicuous. The terminations 

 of the peristome of definita are connected by a very thin callus, whilst 

 in trizonalis it is thick and prominent. 



I take as the type of definita the shell in the British Museum 

 (Cuming Coll.) figured in Reeve's " Conchologia Iconica." 



