ODONTOSTOMUS. 91 



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



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

 with fine, irregular, sinuous whitish stria 1 , 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 ami 

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

 the outer lip narrowly expanded, columellar margin broadlv 

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

 small, oblique, white lamella. 



Length 21.5, diam. (.!, length of aperture 6.8 mill. 



Lengtji 20.5, diam. 6.5, len<_ T tli of aperture 7 mill. 



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



Brazil 



liiiiinins neghctm PER., Zcitschr. f. Mai. 1847, p. 07; Monogr. 

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



Malak. Ges. ix, 1882, p. 10.") Buliiims oblitns REEVE, Couch. 



Icon. pi. 56, f. 37G (Dec., 1848). 



The regular white costellation of the sutural border and very 

 irregular and rather sparse whitish striae of the rest of the surface, 

 are characteristic. The form varies from somewhat eylindric, as 

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

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

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

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

 0. janeirensts 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. avellanedee. 



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.E (Doering). PI. 11, figs. 56, 57, 58, .V.I. 



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 



