96 



FoNTiNAi.is. Helix Bwllaoides. Don. Br. Shells, v. t. 168. f. 2. 



p. 226. •£"'• Trans, viii. p. 2'23. 



Bulla fontinalis. Li». Trans. \'ni. p. 126t. 4. f. 1. 

 Ptilt. Hutch. Dorset, t. 21. f. 6. 



Wc were not a little furpriled to find this very common 

 fpecies of heteroflrophon Bulla, defcribed, and figured by 

 Mr. Donovan for that rare and fingular fliell in the Portland 

 cabinet, denominated Helix Bulaoides, by Dr. Solander ; 

 for a defcription and figure of which we refer to Valuta Bu- 

 laoides of this work. 



We have been allured by a conchological friend who fa- 

 voured us with the Portlandian Bullaoides, that Mr. Donovan 

 was in poffeffion of a fimilar fpecimen, but by fome unac- 

 countable means the figure of B. fontinalis was fubftituted 

 by millake. Now as neither the B. fontinalis nor the B. 

 hypnorutn have found any other place in the Britijh Shells 

 (two fpecimens which have been fometimes confounded ) 

 it was natural to conceive the author had made fome millake 

 in the title and reference to the Bullaoides of the Portland 

 £ahinet, efpecially as that is not only a dextral fpecies, but 

 extremely diffimilar to the other in many particulars. This 

 circumftance however is in fome degree reconciled by obferv- 

 ing that Dr. Solander had namedtwo diftin6l fpecies by the 

 titles of Helix Bullaoides, that is to fay our Bulla fontinalis, 

 and that hereafter defcribed as Valuta Bullaoides, but he 

 marked a diftin^lion in theie by adding to the name of the 

 lafl Lincoln. A confufion has evidently originated from 

 thefe perplexing circumftances : a Ihell with the title 



of 



