OF GONCHOLOGY. 183 



tricuspid, laterals bicuspid ; marginals with one long and one 

 fihort denticle. 



Brazil. Collected by Mr. J. (jr. Anthony. 



Stenogyra decollata, Lin. 



Lingual membrane long and narrow, composed of numerous 

 rows of 3*3 — 1 — 36 teeth. Teeth of the same general character 

 as described below in Stenogyra octona. The marginals, how- 

 ever, appear to have only one long denticle with an obsolete, 

 short, side denticle. 



Rome, Italy. 



Stenogyra gonostoma, Gundl. 



Lingual membrane as in Stenogyra octona, described below. 



Cuba. D. Rafael Arango. 

 Stenogyra octona, Chemn. 



Lingual membrane broad, not long, composed of numerous 

 rows of about 30 — 1 — 30 teeth each. Centrals long, narrow, 

 angularly widened at the centre, the apex recurved into a very 

 small, bluntly trilobed cusp. Laterals very much larger than 

 the centrals, distinctly separated ; plate subquadrate, unsym- 

 metrical, its recurved apex very large, tricuspid, central cusp 

 very much stouter and longer than the side cusps. Marginal 

 teeth long and low, irregularly denticulated, denticles short, 

 stout, blunt. 



This lingual membrane is peculiar from its very small, re- 

 curved apex in the central, and the proportionally large laterals, 

 which are distinctly tricuspid, as much so as is usual in central 

 teeth among the Helicida?. 



Bahia. J. G. Anthony. 



Cylindrella subula, Fer. 



Lingual membrane very long and narrow, composed of nu- 

 merous rows of teeth arranged en chevron. Teeth 10 — 1 — 10 

 in each row, of the same character as those of 0. gracilis, figured 

 by Messrs. Crosse and Fischer (Journ. de Conch., 1870, pi. iv, 

 fig. 1). Centrals long, slender, with a broad reflected cusp. 

 Laterals two on either side of the central line; their basal mar- 

 gin delicately fringed or crimped; the small upper cusp is 

 wanting in the inner laterals, and is represented in the outer 

 lateral by a short blunt point projecting outward near the apex. 

 Marginals 8, long, laminar, with irregularly recurved apices. 



Jamaica. Mr. H. Vendryes. 



