ODONTOSTOMUS. 91 



O. NEGLECTUS (Pfeiffer). PI. 12, figs. 82, 83. 



Shell perforate, fusiform- turreted, thin; pale brownish corneous, 

 with fine, irregular, sinuous whitish stria?, which below the sutures 

 become a regular series of short and very narrow folds. Outlines of 

 the spire convex, apex obtuse, the first two whorls vertically and 

 closely costellate. Whorls 8J, slightly convex. Aperture ovate, 

 the outer lip narrowly expanded, columellar margin broadly 

 reflexed ; columella having a strong fold above, bearing a very 

 small, oblique, white lamella. 



Length 21. .5, diam. G, length of aperture 6.8 mill. 



Length 20.5, diam. 6.5, length of aperture 7 mill. 



Length 19, diam. 6, length of aperture 7 mill. (Pfr.). 



Brazil. 



Bulimus neglectus PFR., Zcitschr. f. Mai. 1847, p. 67; Monogr. 

 ii, p. 113; vi, p. 55 Odontostomus neglectus DOHRN, Jahrb. d. D. 



Malak. Ges. ix, 1882, p. 105 Bulimus oblitus REEVE, Conch. 



Icon. pi. 56, f. 376 (Dec., 1848). 



The regular white costellation of the sutural border and very 

 irregular and rather sparse whitish stria? of the rest of the surface, 

 are characteristic. The form varies from somewhat cylindric, as 

 in Reeve's oblitus, to more conic, regularly tapering from the last 

 whorl to the apex, as in PfeifFer's original type, which is now in 

 Dohrn's collection. It is very similar to 0. guarani Orb., in the 

 strong fold of the columella, the mouth being otherwise toothless. 

 0. janeirensis differs in apical sculpture, that of 0. neylectus consist- 

 ing of rather coarse vertical riblets and finer spirals, being inter- 

 mediate between the grated and costellate groups. 



Group of 0. avellanedce. 



In the single species of this group these are no lamella? or folds. 

 The apices of all the specimens I have seen are too much worn to 

 show sculpture. 



O. AVELLANED^: (Doering). PL 11, figs. 56, 57, 58, 59. 



Shell perforate-rimate, slender and tapering, rather thin, yellowish- 

 olivaceous with some dark oblique streaks, and sometimes suffused 

 with chestnut or smoky brown ; glossy, sculptured with distinct 

 growth-wrinkles, stronger below the suture, and sometimes showing 

 very faint spiral striation. Whorls 7, scarcely convex, the last a 



