PLATE LXXII. 



Buccinuin altemm pclluciuum subflavum, intra senas circiter spiras 

 mucronatum. List. II. An. Angl. p. 1 24. tit. 1 1 » 

 tab. 2. fig. W.—Phil, trans. No. 105. fg. 11. 



The small Whirl Snail, with nuuierous rounds, and winding from 

 tlie mouth towards the right hand. Grew. Mas. 

 p. 132. — Morton AWthampt. p. 415. — Kt Buc- 

 cinum heterostrophum minutum fuscum sex spi- 

 rarum ore subrotmido. Id. p. 4^16. tab. Vi.fg. 1, 



Buccinulum Angliciim heterostrophon oblongum striis capillaceis. 

 Petiv. Mus. p. 65. No. 703. 



Turbo pervcrsus. Reversed, Fenn. Br, Zool. No. U6. tab. 82. 

 fg.UG. 



Strombiformis parvus pullus, ore compre.sso, anfractibus contrariis 

 striatis. Perversus, Reversed Oat. Da Costa 

 Br. Conch, p. 107. tab. 5. Jig. 15. 15. 



This is one of the heterostrope Shells, or such as have the mouth 

 placed on the right side instead of the left, as is usual in most spe- 

 cies. In general, heterosphe Shells are mere accidental varieties only 

 of such as turn in the usual manner * ; but in the present instance, it 

 constitutes a striking character of the species itself. 



It is a matter of some difficulty to reconcile the various opinions of 

 authors respecting the several varieties and growths of this species ; 

 Da Costa has entered into the enquiry ; and the result of his remarks 

 appear at least satisfactory to us. 



* Reversed shells of the common garden snail have been found, though very rarely. 

 Oi?e is mentioned by Dr. Latham in his Synopsis of Birds. 



