74 BBACHYPODELLA, S. STR. 



abundant series in the collection of the Academy is further 

 illustrated in figs. 7 and 9, Cartagena, and fig. 8, Puerto 

 Cabello. It is related to B. morini of Guatemala and B, trini- 

 taria of Trinidad. The latter has more numerous and more 

 convex whorls. In B. morini the whole shell is more slender, 

 the last whorl is more compressed and tapering below, the 

 riblets are more widely spaced, and those of the apical whorls 

 are much finer and more crowded. 



The axis is twisted much as figured for B. morini. The 

 apical whorls have delicate, rather wide-spaced riblets. The 

 crowded, thread-like striae of the rest of the shell are a little 

 bent at the ends, elsewhere but slightly curved, and are whit- 

 ish on a brownish-corneous ground. 



Specimens from Cartagena, with the apex entire, measure 

 12.4 x 2.2 mm., with IS 1 /^ whorls, or 15 mm. with 20 whorls. 

 Truncate shells are 10.5 to 12 mm. long, with 12 to 14 whorls. 

 Truncate shells from Puerto Cabello vary from 9 x 2.4 mm. 

 with 9% whorls to 11.5 x 2.4 mm. with 12 whorls. Entire 

 specimens from this place taper more rapidly above, and have 

 fewer whorls than those from Cartagena. 



Gibbons '"(7. trinitaria" from Sabanilla, N. G., was doubt- 

 less either this species or B. leucopleura. 



26. B. LEUCOPLEURA (Menke). PL 15, figs. 9, 10, 14, 15, 16. 



[< Shell slightly rimate, subcylindric, tapering towards the 

 truncate apex, thin, pellucid, glossy, pale corneous; obliquely 

 ribbed, the ribs straightened, distant and paler. Whorls 15, 

 a little convex, the last shortly projecting, acutely serrate- 

 carinate at the base, the right side subangular. Aperture 

 subcircular, obsoletely angular at the base; peristome free, 

 shortly expanded throughout. Length 13.5, diam. 2.66, diam. 

 aperture 2 mm." (Pfr.). 



Habitat unknown (Menke). Venezuela: Puerto Cabello 

 (Paetel) ; Caraccas (F. Cocking). 



Cyl. leucopleura MKE., Zeitschr. f. Malak., 1847, p. 2. 

 PHILIPPI, Abbild., iii, p. 6, pi. 3, f. 2. PFR., Monogr., ii, p. 

 379. PAETEL, Catal., p. 103. ? C. trinitaria Pfr., GIBBONS, 

 specimen from Sabanilla, New Grenada, Journ. of Conch., ii, 

 131. 



