EPIROBIA. 63 



Cylindrella siviftiana CROSSE, Journ. de Conchyl., xi, 1863, 

 p. 388 ; xv, 1867, p. 200, pi. 5, f . 5. FISCHER & CROSSE, Miss. 

 Sclent. Mex., Moll., i, p. 407, pi. 17, f. 14. PER., Monogr., vi, 

 p. 370. Holospira siviftiana Cr., MARTENS, Biologia, p. 284. 



The internal column is unknown. It seems most closely 

 related to E. berendti, but has more whorls and finer sculp- 

 ture, is 'more slender, and the free portion of the last whorl is 

 longer. Named in honor of Robert Swift. 



E. GASSIEST (Pfeiffer) . PL 20, figs. 5, 6, 7. 



Shell deeply and shortly rimate, fusiform-subulate, rather 

 thin, very finely and densely hair-striate, whitish-corneous. 

 Spire subulate, the apex entire, rather acute; suture simple. 

 Whorls 17, a little convex, subequal, the last free in front, 

 carinate above, slightly tapering downward and rounded at 

 the base. Aperture slightly oblique, obliquely angular-oval; 

 peristome continuous, very narrowly expanded throughout. 

 Length 14, diam. 3 mm. ; aperture 2y 2 mm. in oblique length 



(Pfr.). 



Chiapas, Mexico (Bland). 



Cylindrella gassiesi PFR., Journ. de Conchyl., xv, 1867, p. 

 438; Monographia Hel. Viv., vi, p. 376. FISCHER & CROSSE, 

 Miss. Scient. Mex., Moll., i, p. 410, pi. 17, f. 17. Holospira 

 gassiesi Pfr., MARTENS, Biol., p. 283. 



This species has fewer whorls than any of the genus except 

 E. berendti. The internal axis has not been examined. 



E. APIOSTOMA (Pfeiffer). PL 20, figs. 12, 13, 14, 15. 



Shell subrimate, subulate, subarcuately striatulate, diapha- 

 nous, whitish-corneous. Spire regularly tapering, the apex 

 entire, rather acute. Whorls 22-24, a little convex, the last 

 shortly protracted, angular above, more distinctly striate be- 

 low. Aperture subvertical, obliquely pear-shaped; peristome 

 white, somewhat reflexed throughout, the right margin some- 

 what sinuous above. Length 17, diam. 2y 3 , oblique length of 

 aperture 2 mm. (Pfr.) . 



Cordova, State of Vera Cruz (Salle) ; at the entrance of the 

 cave of Cacahuatl (Hoge). 



