ODONTOSTOMUS. 49 



oblong, \vitli parallel sides, the base effuse, streaked on both sides 

 with brown ; peristome thin, white, expanded, the right margin im- 

 pressed above the middle, columellar margin wider, with an arcuate 

 suit; us at its junction with the whorl. Length 22, diarn. 7 mill.; 

 aperture 1<H mill, long, 2^ wide inside (Pfr.). 



Brazil: Santa Catarina (Cuming Coll.). 



Dohrn writes that he has four specimens from Santa Catarina 

 which agree with Pfeiffer's description of B. parallelus, and are 

 excellently represented by Deshayes' Hgures of Pupa reevei. Deshayes 

 ascribes a columellar fold to his species, and two dentiform folds 

 within the right margin, one opposite the columellar fold, the other 

 a little' forward. Of the Sta. Catarina shells, two have the outer lip 

 even and thin ; in the third there is a slight callous thickening in 

 the middle, and the fourth has two tubercles, but so indistinct as to 

 be seen only if looked for. 



O. CIARANUS Dohrn. PI. 8, tig. 81. 



Shell snbperforate, oblong-fusiform, obsoletely plicate-striate, white, 

 somewhat glossy, rather solid. Whorls 9, but slightly convex, the 

 earlier 6 conically widening, those below subcylindrical, the last 

 whorl compressed at the base. Aperture subvertical, truncate-oval, 

 4-toothed : a compressed, sinuous obliquely descending columellar 

 lamella, and three small marginal teeth within the lip, one basal, one 

 in middle of the outer margin, and one at the insertion. Peristome 

 narrowly expanded throughout, having two pits outside, the termi- 

 nations distant, columellar margin dilated, half covering the perfora- 

 tion. Length 22, diam. 7, length of aperture 7, width 5 mill. 



(Dohrn). 



Brazil : Ceara, state of Ceara. 



Odontostomus ciaranus DOHRN, Jahrb. d. D. Malak. Ges. ix, 1882, 

 p. 104, pi. 3, f. 14. 



Seems to resemble 0. occultus and ringens in the teeth, the lower 

 palatal fold being sub-basal in position ; but there is a suprapalatal 

 fold near the insertion of the outer lip, and a parietal lamella is 

 absent, as in 0. occultus. 



O. RINGENS (Dunker). PL 8, tigs. 88, 89. 



Shell rimate subperforate, fusiform, thin, smooth, pale corneous 

 with brown streaks, or corneous covered with an ashen-streaked 



