76 lUnM.ll-. MF.XICO AND (JKX-TKAL AMKKICA. 



Alt. 2S, (\\i\m. 14, length of aperture 13 mill. (from fig.) 



N. W.Mexico: >'///<//-,/ (Tryon). Mexico, without nearer indica- 

 tion of locality (Reeve). 



J'>, ill,,, us nn'.rlcanus (Lamarck). REEVE, Conch. Icon, v, Jitilinms, 

 pi. 40, fig. 244 __ Dr>//ii(ins ntt>.ri'cantis (Lamarck), Tin ON. Am. Journ. 

 Conch, iii, p. 108, pi. 9(13), fig. 5 (copy from Reeve) (1*07). Not 

 B. mexicamis Lam., see vol. xi. p. 291. /{iilfi/tiiliis (Th<tnn>astiis) 

 tryom, Fisrn. A- CROSSE, Miss. Scient. Mex., Mollusea. i, p. 565, 

 and v. pochiitlensis, pi. 24, f. 3. 3a. Olost<* tryoni MAKTEN>, 

 Biologia, p. 232. 



A somewhat doubtful species, based upon Reeve's figure of "B. 

 mexic<t}tns." I do not know where the specimens are upon which 

 Tryon based the locality " Cinaloa." It seems to be near D. emeus 

 Say. 



Yar. TOCIIUTLEXSIS Crosse & Fischer. PI. 3, figs. 54, 55. 



Encircled by brown, white and pale tawny bands; peristome 

 whitish-brown. 



Alt. 24, diam. 1H mill. (C. & F.) 



W. Mexico: Pocftutla, near C'hilapa, in the State of Guerrero (Salle). 



GROUT or D. SULTHUKEUS. 

 D. suLriifiu-rs (Pfeiffer). PI. 4, figs. 65, 66, 67, 68. 



Shell perforate, ovate-conic, thin, somewhat translucent, pale sul- 

 phur colored or (probably by exposure to light) white. Surface 

 glossy, with slight growth stria' and line, regular engraved spiral 

 lines. Spire lengthened-rmiic, apex rather obtuse. Whorls '>' >', 

 (61 according to Pfr.), but slightly convex, the last convex. Aper- 

 ture decidedly oblique, ovate ; peristome slightly and narrowly ex- 

 panded at the edge, the rnlmnellar margin shortly rellexed above, im- 

 pressed at its insertion; columelhi straight above. 



Alt. 29.'., diam. 15, length of aperture 14.\ mill. 



Alt. 2S, diam. 14, length of aperture l.'ij, mill. 



Cent ml Mr.rim: near ///< city of Mexico (Hahn). E. Mexico: 

 Comnhijm nnd Soncwmtla, both nr:ir .lalapa ( Sir.-bi-l ) ; Mfrwlor 

 (Strebel); Atoi/ur ,i,ul Oriznlxt (Iloge); <'<-<lr<i (Salle); 5. E. Mex- 

 ico: 7'"V" in Tabcuco (H. II. Smith). N. (.'init.-m.i/n : <',,l,i1y,iitz t 

 norlli of Cohan, in the dense forests of Yera Pa/, drainage into the 

 Rio de la 1'a-ion ( Chaiii]iioii ); Chun-am, near LaiKjuin, on the Ca- 



