50 ODONTOSTOMUS. 



epidermis. Spire turreted, rather acute. Whorls 7-7-|, nearly flat, 

 the last scarcely exceeding one-third the length of the shell. Aper- 

 ture narrow, oblong, 4-tootlied : one parietal tooth, a second on the 

 folded columella, the third at the base, and the fourth in the middle 

 of the outer lip. Peristome white, expanded. 



Length 18, diain. ;V.' { , aperture 7 mill, long, 4 wide. (_Dkr.) 



Brazil (Bescke); Macahe, prov. Rio Janeiro (Dkr. coll). 



Bull nuts ringens DKR., Zeitschr. f. Malak. 1847, p. 83. REEVE, 

 Conch. Icon., pi. 75, f. ;">42 (1849) PFR., Monogr. ii, p. 80; iii, 

 368; iv, 430; vi, 76. 



A rather narrow, elongate, smooth species, with rather stout and 

 obtuse upper and lower palatal plicse ; the parietal and columellar 

 lamellae compressed, the latter superposed upon a columellar fold, 

 essentially as in 0. bahiensis. There, is a deep brown stripe behind 

 the lip and columella, but the narrowly rounded base is white. It is 

 related to 0. bahiensis and especially 0. occultus, species which differ 

 in the absence of a parietal lamella. Dunker, if it was he who wrote 

 the original description of 0. ringens, gives merely the locality 

 Brazil ; but Reeve, who figures a specimen from Dunker's collection, 

 says Macahe. The single specimen before me (fig. 89) bears no 

 locality but " Brazil." 



O. ALBOFILOSUS (Dohrn). PI. 8, figs. 90, 91. 



Shell rimate-perforate, fusiform, thin, rather glossy, whitislt- 

 liyaline, spirally very delicately silicate. Spire turreted, the apex 

 attenuated, suture thickened with a white thread. Whorls 7 to 8, little 

 convex, the last about two-fifths the total length, attenuated at base, 

 shortly ascending in front, having two pits behind the lip. Aperture 

 vertical, oblong with an expanded peristome, broadly effuse beiow, 

 milk-white and glossy; narrowed by 4 teeth : one vertical lamelli- 

 form parietal lamella, a triangular tubereuliform columellar lamella, 

 a large fold within the outer margin and a minute one within the 

 basal margin. Length 22-24, diam. 6^-7, length of aperture 10, 

 width ") mill. (Dohrn.) 



Brazil : Province of Bahia or in the Mucury River region, in 

 Minas Geraes (Lieut. Will). 



Bulintitx olbofilosus DOHRN, Jahrb. d. D. Malak. Gesellsch. x, p. 

 :;:.!, p. 11, f. 7 (1883). 



Nearest to 0. bahiensis in form, but distinguished from all other 



