192 Binney on Terrestrial Mollnsks. 



characters by which to designate and divide the several 

 genera : semioval or triangular. 



Pfeiffer gives these as additional characteristics to those 

 of the suborder. 



There are several genera comprised in the family, — 

 Alcadia, Trochatella, Lticidclla, Stoastoma^ and Helicina, 

 but the latter only has been found in this country. 



For remarks on the animals of this family, see vol. ii- 

 p. 350. 



Genus HELICINA Lamark. 



HKLICINA CHRYSOCHEILA Binxey. . . .vol. ii. p. 354, pi. Ixxiv. fig. 4. 

 Helicina chrysocheiln Pfeiffer, Mon. Pneum. Viv. ii. p. 197. 



I have in my cabinet my father's type of this species, 

 and consider it distinct from HeL Jamaicensis Sowb., and 

 all other described species. I have a note taken by my 

 father at the collection of M. Petit, in Paris, in which he 

 says that a similar shell is labelled from Tampico. 



In the collection of the Smithsonian Institute is an 

 individual from Texas, (Wiirdemaim.) It seems allied to 

 Hel. tnrbinata Wiegm. 



Shuttleworth has used this name (1852) for another 

 species, but has not priority. 



HELICINA HANLEYANA Pfeiffku. 

 Plate LXXV. Figures 14, 16. 



T. globoso-conica, solidiila, liiieis concentriois impressis, subdistantibus 

 sculpta, vix (liapliana, nitiila, fiilvo-form>a ; spira breviter oonoidoa, 

 obtusiiisfula ; aiit'r. o vi.\ ODnvcxiusculi, ultimiis nituinlatus, aiiticc siib- 

 dcsccndens ; apcrtura paruni oblitpia, subsemicirciilarls ; columella bre- 

 vissima, c.xtrorsiim di-nticiilata, calluiu temicin, albidum, diffiisuin emit- 

 tens; perist. album, vix e.\pan.-:iusculum, iutus subiucrassatum, basi iu 

 deuticulum columellai abiens. Opcrc. ? Dlam. maj. 7^, miu. 6^, alt. of 

 mill. 



Habitat prope New Orleans (Salle). 



