Achatinella and other Pulmonata. 341 



We are indebted to our you»g friend A. Ten Eyck Lan- 

 sing for assistance in the study of this lingual. 



He3aiemann's figure of the dentition of Peronia ( Onchi- 

 della) is somewhat similar to that described above, at least 

 in the general form and arrangement of the teeth. (Mai. 

 Blatt., 1868, XV, pi. iii, fig. 10.) 



Helix jjicfa, Boru (Polymita). 



A Cuban species. The specimen examined was captured 

 on a bunch of bananas in New York by Mr. M. Brandigee, 

 who kindly sent it to Bland. 



Jaw (pi. xvi, fig. 1) thick, arched, high, ends bluntly rounded, but 

 little attenuated; anterior surface without ribs; cutting edge without 

 median projection; a trausvei'se, median line of reinforcement. 



Lingual membrane (pi. xvi, fig. 2) long and broad. Teeth ari'anged 

 strongly en chevron, of nniforni shape on all parts of the membrane. 

 Centrals long, narrow, bluntly truncated at top, slightly incurved at sides, 

 rounded and fringed at base, near which is the gouge-shaped, expanded, 

 tricuspid cutting edge. The central cusp is bluntly rounded, the exterior 

 cusps curve outward and are pointed. The lateral teeth are of the 

 same form with the centrals, but are slightly unsymmetrical. There are 

 no distinct marginal teeth. 



By its jaw and lingual membrane. Helix picfa is closely 

 allied to Helix muscarum, Lea (see Amer. Journ. of Conch., 

 VI, 204, pi. ix, figs. 4, 16). The last named species is, 

 however, placed by von Martens in the subgenus Polyinita 

 and jgicta in Liochila. There can be no doubt that both 

 species belong to the same subgenus, but as Helix muscarum 

 is the type of Pohjmita, that name must be retained instead 

 of Liochila. We anticipate finding the same curious type 

 of lingual dentition in H. suljjhurosa, Morel, (which is" 

 scarcely distinguishable from H 2ncta), also referred to 

 Liochila by von Martens, but are scarcely prepared to ex- 

 pect it in LAochila Jamaicensis, Chem. The latter, which is 

 the type of Liochila, will therefore remain undisturbed in 

 its systematic position, unless, indeed, it belongs to Thelid- 

 omus, in which case the name Liochila will be placed in the 



