276 WEST CUBAN OBELISCUS. 



32. 0. GONOSTOMA ('Giindl.' Pfr.). PL 33, figs. 34, 35, 36. 

 Shell subrirnate, fusiform-turrite, rather thin, densely al- 

 most straightly plicate-striate, diaphanous, waxen. Spire 

 long, slowly tapering, the apex obtuse. Whorls 10, a little 

 convex, the last more or less free, carinated above, somewhat 

 impressed laterally. Aperture oblique, angulate-pirif orm ; 

 peristome simple, continuous, a little expanded throughout. 

 Length 13, diam. 2.33, aperture 2x1.5 mm. (Pfr.). 



Western Cuba : Lagunillas de Consolacion, under stones 

 (Wright). 



Stenogyra gonostoma Gundlach niss., PFR., Malak. Blatter, 

 x, 1863, p. 247. AEANGO, Fauna Mai. Cubana, p. 92. BIN- 

 NET, Ann. N. Y. Acad. Sci., iii, p. 100 (teeth). Bulimus 

 gonostomus PFR., Monogr., vi, p. 101 ; Novit. Conch., p. 374, 

 pi. 87, f. 10-12. 



A specimen from Lagunillas is drawn, fig. 34, 35. This 

 shell is 12 mm. long, 2.5 wide, with a trifle over 10 whorls. 

 In this typical form only the last third or less of the last 

 whorl is free. 



In another form of the species, also taken alt Lagunillas by 

 Wright, fully a half whorl projects free (pi. 33, fig. 36), and 

 the shell often has an additional half whorl; length 12.3, 

 diam. 2.3 mm. This form approaches the preceding species. 

 The teeth of 0. gonostoma are stated by Binney to resemble 

 those of Subulina, octona (Ann. N. Y. Acad. Sci., iii, p. 100). 



33. 0. MICROSTOMA ('Gundl.' Pfr.). PI. 33, figs. 37, 38, 43, 



44. 



Shell imperforate, cylindric-turrite, closely rib-striate, little 

 shining, waxen. Spire elongate, slowly tapering, the apex 

 rounded. Whorls 9y 2 , a little convex, the last slightly more 

 than one-fifth the total length, slightly tapering basally. 

 Aperture oblique, angulate-oval ; peristome simple, unex- 

 panded, the right margin a little arched forward, columellar 

 margin somewhat -calloused. Length 14, diam. 3, aperture 

 3x1.5 mm. (Pfr.). 



Western Cuba: sugar plantation Esperanza, Pinar del Rio 

 (Wright). 



