92 BRACHYPODELLA,, JAMAICAN. 



third: apex truncate with the loss of whorls: whorls re- 

 maining nine or ten, planulate or slightly concave, with a 

 deep suture; last whorl widely disjunct in its last third part 

 from the penult, whorl, with an angle on the right and an- 

 other on the lower side: aperture subangular above and be- 

 low, more angular on the right: lip rather thin, reflected into 

 the plane of the aperture, moderately expanded. Length .37 

 inch; breadth .095 inch " (Ad.). 



Length 9, diam. 2 mm., whorls remaining 9. 



Length 8.4, diam. 2 mm., whorls remaining Sy 2 . 



Length 9.5, diam. 1.7 mm., whorls 16 (entire). 



Jamaica: along the northern coast from Montego Bay to 

 Port Maria. 



Cyl. robertsi C. B. AD., Contrib. to Conch., no. 9, p. 160 

 (April, 1851), in Ann. N. Y. Lyceum of Nat. Hist., v, p. 84. 

 PFR., Monogr., iii, p. 575. SOWERBY, C. Icon., xx, pi. 12, 

 f. 111. HENDERSON, Nautilus, viii, p. 20. GLOYNE, Journ. 

 de ConchyL, 1875, p. 122 (Rio Bueno). 



A larger form than B. costulata, and well differentiated 

 therefrom by the interruption of the ribs, which persist only 

 near the sutures, or are weakly connected across the middle 

 of the whorls, and are more numerous than in B. costulata. 

 I have seen specimens from Montego Bay (Henderson), Fal- 

 mouth, Trelawny (Jarvis, figs. 45, 46), and west of Ocho Rios 

 (Henderson). 



While the upper whorls are a little shouldered below the 

 suture, the latter is only moderately impressed, not deeply 

 constricting as in the next species. 



40. B. SEMINUDA (C. B. Adams). PI. 5, figs. 41, 42, 44. 



Shell slowly tapering, broadly truncate, corneous, rather 

 thin, nearly lusterless. Whorls flattened in the middle, sub- 

 angular below the very deeply impressed sutures, the last 

 whorl angular below also, the sides sloping inward; its latter 

 half concave between the basal and supraperipheral angles, 

 free in front. Sculpture of numerous whitish ribs, low or 

 partially obsolete in the middle of each whorl, prominent be- 

 low, and somewhat less so above, the suture. Aperture trans- 



