BINNEIA. 



67 



Limax Uneatiis, DeKay (see Terr. Moll. II, 33), is mentioned by name 



only, without description. 

 To vol. I, p. 48 et seqq. and vol. IV, p. 32, of the Terrestrial Mollnsks, I 

 refer for information regarding the following species of Rafi.vesque. Some 

 of them are mentioned by Fekussac, Gkay, Grateloup, &c., but no addi- 

 tional information is given by them : — 



Limax gracilis {Deroceras). See also DeKay, N. Y. Moll. 22 ; Gkay and 



Pfeiffer, Brit. Mus. Cat. 

 Eumelus lividus, 

 Eiimelus nebulosus. 



Rafinesq0e also mentions — by name only, though not from America, no 

 locality being given — Zilotea, Urcinellu, and Tesiacina (Analyse de 

 la Nature; see Binkey and Tryon's edition of Rafinesqoe, 17). 



Subfamily HELICIN.E. 



Jaw arcuate, with stout vertical ridges, reaching to and crenu- 

 lating the concave margin ; no middle projection. 



Teeth of the lingual ribbon uniform, short, bicuspid or tricuspid. 



BIIVJVEIA, J. G. Cooper. 



Body about three times as long as shell, semi-cylindrical, 

 obtuse in front, forming an acute angle behind ; foot extending 

 the whole length, somewhat distinct anteriorly, and carinate 

 behind. Mantle shield-like, covering 

 the back anterior to the shell for about 

 one-fourth its length, not reflected over 

 the shell. Eye-peduncles moderate, 

 slender ; two short, acute tentacles in 



front of head. Respiratory orifice ? 



Generative orifice ? 



Fig. 109. 



Animal of Binneia notabilis. 

 [Cooper.] 



Shell entirely external, unguiform, 

 nearly flat, about one-third as long as 

 the animal, which it does not half cover when retracted. Spire 

 flattened, forming two horizontal volutions, last whirl enor- 

 mously expanded and slightly arched. Columella distinct, 

 entire, hiding the interior of the convolutions ; peristome simple, 

 acute. 



