88 BULIMULUS-PROTOGLYPTUS. 



finely and irregularly striated, the striae cut by a few incised spirals ; 

 base smoother. Spire conic, apex obtuse; If apical whorls with 

 regular riblets, which are a trifle curved and finer on the latter 

 part (fig. 24). Whorls 7, slightly convex, the last rounded-oval, 

 not descending. 



Aperture subvertical, about half the length of shell, whitish with 

 light brown bands inside; peristome obtuse, with an extremely nar- 

 row reflexion, white ; the columellar margin dilated above and re- 

 flexed. Alt. 24, diam. 14 mill. 



Bahia, Brazil. 



Bulimus durus SPIX, Test. Bras., p. 5, pi. 6, f. 2. DESH. in Lam., 

 viii, p. 242. REEVE, Conch. Icon., pi. 40, f. 253. PFR., Mouogr., 

 ii, p. 104. Rhinus durus W. G. BINNEY, Ann. N. Y. Acad. Sci., 

 iii, p. 124 (dentition and jaw). 



The solid, compact form of this species, and its costellate apical 

 whorls, are unlike other described forms except the following two. 



B. OVULUM (Reeve). PL ] 2, fig. 48. 



Shell narrowly umbilicated, ovate-conic, solid, smoothish, shining, 

 white. Spire conic, rather obtuse ; whorls 6*, a little convex, the 

 last slightly longer than the spire. Aperture vertical, oval ; peri- 

 stome simple, white, the columellar margin vertical, dilated at base, 

 vaulted-reflexed, right margin narrowly expanded. Alt. 20, diam. 

 11 mill.; aperture 11 mill, long, with peristome 8J wide. (Pfr.). 



Pernambuco (Pfr.). 



Bulimus ovulum REEVE, Conch. Icon., pi. 76, f. 556. PFR., 

 Monogr., iii, p. 338 ; iv, p. 399 ; vi, p. 45. 



Described from the " Philippines (Mus. Cuming) " by Reeve, but 

 Pfeiffer corrects the locality as above. Judging from description 

 and figure, it must be very near small and colorless forms of B. 

 durus; but the apical sculpture is unknown. 



B. PACHYS Pilsbry. PI. 12, figs. 44, 45. 



Shell umbilicate, ovate-conic, solid and strong ; surface smooth- 

 ish, with slight growth-wrinkles, rather regular and close on the 

 spire, and disposed to be interrupted. Spire acutely and straightly 

 conic with subhorizontal sutures, the apex small, obtuse, earlier If 

 whorls regularly and rather finely costulate vertically. Whorls 7?, 



