BRACHYPODELLA, S. STR. 71 



A small form, which I called var. dubia, occurs at Labna. 

 The shells measure about 10 x 2 mm., retain 12 to IS 1 /^ whorls, 

 and have 17 to 18 riblete on the penult, whorl. 



22. B. BOURGUIGNATIANA (Ancey). PI. 7, figs. 32, 33, 34. 

 Shell subrirnate, cylindric, slightly tapering to a broad trun- 

 cation, pale brownish gray, rather solid but thin; surface 

 lusterles,s, sculptured with slightly oblique, nearly straight 

 lamella-like ribs, separated by intervals of three or four times 

 their width, and 18 to 20 in number on the penult, whorl. 

 Whorls but slightly convex, separated by a deep suture, the 

 last whorl free, slightly descending and projecting forward, 

 swollen at the periphery, very strongly carinate beneath, flat- 

 tened above the lateral bulging. Aperture somewhat oblique, 

 rounded, subangular outwardly and less so at the base ; peris- 

 tome expanded and somewhat reflexed. Axis stouter than in 

 allied species, very indistinctly twisted. 



Length 10, diam. 2.6 mm., whorls 10. 



Length 9.5, diam. 2.5 mm., whorls 8i/>. 



Length 9.5, diam. 2.3 mm., whorls 9. 



Length 11.5, diam. 3 mm., whorls 9-10 (Ancey, types). 



Honduras: Utilla island, off the N. coast (C. T. Simpson). 



Cylyndrclla bourguignatiana ANC., Annales de Malacol- 

 ogie, ii, p. 243 (May, 1886). Cylindrella ~b., PILSBRY, Proc. 

 A. N. S. Phila., 1891, p. 316, pi. 15, f. 13, 13a. v. MART., 

 Biologia, p. 286. 



This species, of which part of the original lot is before me, 

 is closely related to B. speluncfc and B. morini. The number 

 of riblets is intermediate between these two species. It differs 

 from both in being wider, and more shortened by truncation, 

 and in the perceptibly stouter and less spirally twisted in- 

 ternal axis. The relationship with B. pallida and other forms 

 mentioned by Mr. Ancey is not especially close. 



23. B. SUBULA (Ferussac). PI. 2, figs. 20, 21, 22. 



Shell truncate, slender, subcylindric, tapering above. Ob- 

 liquely, very closely \confertissime] costulate-striate ; the 

 numerous very fine and oblique lamellae are distributed quite 



