BRACilYPODKLl.A, S. STK. 09 



20. B. SUBTILIS (Morelet). PI. 6, figs. 11, 12, 19, 20. 



Shell very slender, fusiform, the upper half or more taper- 

 ing to a narrow truncation or rarely an entire apex; corneous, 

 thin. Surface somewhat shining, sculptured with Imr, tcide- 

 spaced riblets. Suture slightly margined'. Whorls strongly 

 convex, the greatest convexity above the middle of each; the 

 last whorl is swollen at the periphery, strongly carinate be- 

 low, projecting forward and a little descending, the neck 

 much more sharply and closely costulate than the preceding 

 whorls. Aperture slightly oblique, subangular outwardly 

 and below; peristome thin, broadly expanding and subre- 

 flexed. Axis slender, encircled by a small spiral lamella, as 

 in B. wori a i. 



Length 13.5, diam. 2.2 mm., whorls remaining 17Vo ; plug 

 at 13. 



Length 12.5 to 14, diam. 2.5 mm., whorls remaining 16 to 21 

 (Crosse). 



Northern Guatemala : woods of the province of Peten 

 (Morelet). 



Cyl. suit His MOREL., Testae. Noviss.. i, p. 11 (1849). PFR., 

 Monogr.. iii. p. 577; iv, 708; vi, 386; vii, 444; Conchyl. Cab., 

 p. 51, pi. 5, f. 33-35. CROSSE ET FISCHER, Moll. Mex., i, p. 

 413, pi. 17, f. 13. SOWERBY, C. Icon, xx, pi. 14, f. I25.Holo- 

 spira subtilis v. MART., Biologia, p. 284. 



According to Morelet, the type, with the spire entire, has 

 23 whorls. It stands near B. inorini. differing in the reduc- 

 tion of the ribs to low welts, which are more widely spaced 

 than the lamella-like ribs of morini, and in the slightly mar- 

 gined suture. The specimen described and figured on my 

 plate, as well as those in Crosse 's and Pfeiffer's collections, 

 came from Morelet, no other naturalist having found the 

 species. 



21. B. SPELUNO-E (Pfeiffer). PI. 6, figs. 13, 14, 17, 18. 



Shell not rimate, cylindric-turrite, subulate, very slender, 

 rather thin, hardly shining, yellowish-corneous, with some- 

 what oblique, distant, lamellose riblets. Spire long, entire, 

 the suture impressed. Whorls 22, a trifle convex, the first 



