180 AMERICAN JOURNAL 



Helix excellens, Pfr. (Caracolus.) 



Lingual membrane long and narrow. Teeth as usual in the 

 genus; centrals and laterals tricuspid and bicuspid; marginals 

 short, narrow, with two oblique, stout, blunt denticles, the inner 

 one the longer. 



San Domingo. Dr. Newcomb. 

 Helix Phcenix, Pfr. (Acavus.) 



Jaw long, low, arcuate, ends but slightly attenuated, blunt; 

 very thick and coarse; no anterior ribs ; no median projection 

 to the cutting edge. 



Lingual membrane as usual in the genus; centrals and laterals 

 long, narrow, tricuspid and bicuspid as usual, the middle cusp 

 stout; marginals a simple modification of the laterals. 



We are indebted to Mr. J. G. Anthony, of the Museum of 

 Comparative Zoology, for the specimen from which we extracted 

 the jaw and lingual membrane here described. 



Helix fuscocincta, Ad. (Leptoloma.) 



Jaw thin, arcuate, high, ends bluntly truncated ; with per- 

 pendicular striae ; cutting edge with a median projection. 



Lingual membrane as usual in the genus. Marginal teeth 

 with several oblique, short, blunt, stout denticles. 



Jamaica. 

 Cochlostyla fulgetrum, Brod. (Ganistrum.) 



Jaw thick, wide, low, arcuate, ends but slightly attenuated, 

 blunt ; anterior surface with more than twelve stout, broad ribs, 

 denticulating both margins. 



Lingual membrane long and broad, composed of numerous 

 rows of about 80-1-80 teeth each. Centrals and laterals as 

 usual in the Helicince, the side cusps of the reflected apex being 

 but slightly developed, and the central cusp bearing a short, 

 stout, blunt point ; the lower margin of the base of attachment is 

 strongly concave, with lateral pointed expansions. The marginal 

 teeth are of the same form as the centrals and laterals, the basal 

 margins being still more excavated and having still more strongly 

 developed lateral expansions, the. upper margin of the base of 

 attachment is also greatly produced and bluntly pointed. 



The specimen examined was preserved in the Museum of 

 Comparative Zoology, at Cambridge. 



Bulimus oblongus, Mull, var. albtjs. (Bonis.) 



Jaw slightly arcuate, stout, low, of almost equal height 

 throughout; ends but slightly attenuated, blunt; surface with 



