84 BRACHYPODELLA, S. STR. 



29 is evidently not perplicata. The original figures of Ferus- 

 sac are copied on my plate. 



33. B. PALLIDA (' Guild.' Pfr.). PL 7, figs. 30, 31. 



Shell subcylindric below, the upper half or more tapering 

 to a narrow truncation, or rarely a perfect apex; often wid- 

 est in the middle ; thin, fleshy whitish or bluish in places from 

 the contained soft parts ; lusteiiess, sculptured with large, 

 rounded, subvertical ribs, which are depressed or almost in- 

 terrupted in the middle, swollen towards both ends, and are 

 more or less hollow; the intercostal intervals being delicately 

 striate. Whorls somewhat convex, parted by a deep suture, 

 the last whorl projecting free, strongly but bluntly carinate 

 below, concave above the keel. Aperture rounded-squarish, 

 obtusely angular at the outer and basal margins; lip broadly 

 reilexed, excavated within at the positions of the outer and 

 basal keels. Axis simple, slender and straight. 



Length 10.5, diam. 2.2 mm., whorls 12. 



Length 8.7, diam. 2 mm., whorls 10. 



Length 10, diam. 2 mm., whorls 15 (apex entire). 



Virgin Islands and Porto Rico: St. Thomas, on the hill 

 opposite Baker's; St. John (Bland) ; Tortola (Bland, Swift) ; 

 Porto Rico : San Juan, Vega Baja, and Penuelas. 



Brachypus pallidus Guilding in coll. B. M. Cylindrella 

 pallida Guild., PFR. in Philippi, Abbild., ii, p. 52, pi. 2, f. 14 

 (1845) ; Monogr., ii, 379; iii, 575; vi, 381; Conchyl. Cab., p. 

 46, pi. 5, f. 15-17. BLAND, in C. B. Ad. Contrib. to Conch., 

 no. 11, p. 217 ; Ann. Lye. N. Y., vi, p. 71. MARTENS, Jahrb. 

 d. D. Malak. Gesell., iv, 1877, p. 352 ; Nachrbl., xxiii, 1891, p. 

 132. CROSSE, Journ. de Conchyl., 1892, p. 26. SOWERBY, C. 

 Icon., xx, pi. 4, f. 30. Brachypodella pallida P. & V., Proc. 

 A. N. S. Phila., 1898, p. 278. BALL & SIMPSON, Bull. U. S. 

 Fish Comm., xx, 1900, p. 377. Siphonostoma costata Gldg., 

 SWAINSON, Malaeol., p. 333, f. 97c, d. C. costulosa C. B. AD., 

 Contrib. to Conch., no. 6, p. 98 (March, 1850). 



Very distinct by its strong hollow ribs, similar to those of 

 Idiostcmma, Callonia, etc. Description and figures are from 

 Tortola specimens, with which those of St. John and St. 



