86 BRACHYPODELLA, S. STR. 



35. B. RIISEI (Pfeiffer). PL 7, figs. 28, 29. 



Shell slender, cylindric, the upper third or half tapering to 

 a narrow truncation on rarely an entire apex; thin, pale 

 brownish-corneous or whitish, nearly lusterless, sculptured 

 with low, wide-spaced riblets, often obsolete on the convexity 

 of each whorl, but strong near the suture. Whorls but slightly 

 convex, the last obtusely carinate below, becoming free, de- 

 scending and built forward. Aperture oblique, rounded, the 

 outer and basal margins obtusely angular; lip renexed, ex- 

 cavated within at the outer angle. Axis straight, slender, 

 with a very slight twist. 



Length 12, diam. 2 mm., whorls remaining 



Length 9, diam. 1.9 mm., whorls remaining 



Length 13.2, diam. 1.9 mm., whorls 18% (apex entire). 



Length 10, diam. 1.9 mm., whorls 15% (apex entire). 



Length 13, diam. hardly 2% mm., whorls 19 (Pfr., type). 



Porto Rico: San Juan, Santa Catarina (Blauner) ; Agua- 

 dilla Yega Baja, Caguana (Gundlach) ; Penuelas (Sinten- 

 sis), Arecibo (Dr. Cleve). 



Cyl. riisei PFR., Zeitschr. f . Malak., 1852, p. 133 ; Conchyl. 

 Cab., p. 48, pi. 5, f. 18-20; Monogr., iii, p. 578. SHUTTLE- 

 WORTH, Diagn. n. Moll., 1854, p. 54. MARTENS, Jahrb., iv, 

 1877, p. 352; Nachrbl., xxiii, 1891, p. 132. SOWERBY, C. 

 Icon., pi. 11, f. 94 (riisei). CROSSE, Journ. de Conch., 1892, 

 p. 27. Brachypodella r., PILS. & VAN., Proc. A. N. S. Phila., 

 1898, p. 278. D ALL & SIMPSON, Bull. U. S. Fish Comm., 1900, 

 xx, p. 377. C. rissei Pfr., Paetel, Catalog, ii, p. 249 (1889). 



Near pallida and chordata, but with the ribs partially de- 

 generate, and the shell is more lengthened and slender. Four 

 or five whorls are generally deciduous. Figure 29 is from a 

 specimen received from Riise; 28 is after Pfeiffer. 



36. B. DOMINICENSIS (Pfeiffer). PI. 8, figs. 48-51. 



Shell small, cylindric, the upper half tapering to a narrow 

 truncation or rarely retaining the apex entire (fig. 51, x 20). 

 Pale grayish or fleshy corneous; thin. Surface hardly shin- 

 ing, sculptured with narrow whitish riblets parted by spaces 

 about 4 times their width. Whorls convex', the last tapering, 



