146 BULIMULUS. 



narrowly reflexed above. Length 16^, diam. 9^, longest axis of 

 aperture 9^ mill. 



Brazil : E. do Sao Paulo (Dr. H. von Ihering.) 

 An excessively fragile species, with peculiar apical sculpture. 



B. DUKINFIEI.DI Melvill. PI. 25, fig. 30. 



Shell ovate-oblong, narrowly umbilicate, thin, olivaceous, almost 

 smooth ; whorls 6, the apical ones mamillate ; sutures strongly im- 

 pressed ; longitudinally indistinctly obliquely striate, and under a 

 lens spirally rugulose-striatulate ; the last whorl much larger than 

 the rest. Aperture whitish ashy, the peristome delicately reflexed, 

 whitish, smooth, the columellar margin a little thickened, straight. 

 Length 28, width 13 mill. (Melv.). 



Brazil : Salto Grande do Rio dos Patas (upper waters of river 

 Ivahy), Parand (E. D. Jones, Esq.). 



Bulimulus (Drymaus) duhinfieldi Melv., Proc. Malac. Soc. Lond. 

 iv, no. 3, p. 116, fig. (October, 1900). 



" A plain but interesting species, procured from a district hitherto 

 almost un worked, that does not seem much akin to any other of the 

 genus known to me." It is named for Mr. E. Dukinfield Jones, 

 who collected two specimens in 1899. Type in British Museum. 



B. MARCIDUS (Pfeiffer). PI. 25, figs. 23, 24. 



Shell subperforate, ovate-oblong, very thin, striatulate, decussated 

 by impressed concentric lines, slightly shining, pellucid, dull corne- 

 ous. Spire oblong-conic, rather obtuse. Whorls 6, slightly convex, 

 the last as long as the spire, somewhat tapering at base. Columella 

 receding above, then vertical. Aperture obliqfle, oval ; peristome 

 simple, a very little expanded, the columellar margin a little reflexed, 

 subappressed. Alt. 20, diam. 8 ; alt. of aperture 10^ mill. (Pfr.). 



Brazil (coll. Pfr.). 



Bulimus marcidus PFR., Monogr. iii, p. 435 (1853); P. Z. S., 

 1852, p. 67 ; Conchyl. Cab., p. 188, pi. 49, f. 11, 12. 



" Very similar to B. transparent Rve." 



B. PLICATULUS (Pfr.). Vol. xi, p. 72. 



Add to synonyms : B. pliculatus Pfr.-Cless., Nomencl. Hel. Viv., 

 p. 244. 



