MACROCERAMUS, HAITI. 133 



at all probable. Lamarck gave the locality " Guadeloupe," 

 which is almost certainly wrong. 



14. M. COSTATUS Maltzan. PL 15, fig. 11. 



' Shell narrowly perforate, conoid; buff- whitish, profusely 

 spotted and tinted with ashy-brown ; sculptured with distinct, 

 irregular ribs, obsoletely striated spirally between the ribs. 

 Whorls. 12-13, regularly increasing, a little convex, separated 

 by an impressed, somewhat irregular suture, the last whorl 

 slightly tapering, encircled with a projecting basal keel, 

 marked with a brown band. Aperture ovate-circular, lightly 

 truncate-emarginate above, subvertical ; peristome simple, 

 thin, the outer margin straightened, below and at the base 

 expanded and slightly reflexed; margins distant, the colu- 

 mellar margin reflexed, appressed. Length 14, diam. of last 

 whorl 5 mm." (Maltz.) 



Haiti: Gonaives (H. Rolle). 



M. costatus MALTZ., Nachrichtsblatt d. deutschen malak. 

 Ges., xx, p. 178, no. 3 (Dec., 1888). CROSSE, J. de C., 1891, 

 p. 133, pi. 2, f. 2. 



This is a rather straightly turrited, ribbed shell, related to 

 M. ludovici and klatteanus, and perhaps identical with M. 

 unicarinatus. I have not seen specimens. 



15. M. ANGULATUS Weinland & Martens. 



' Shell perforate, conic-turrite, thin, obliquely striatulate, 

 glossy ; white, with longitudinal interrupted corneous streaks, 

 the apex pale; suture crenulate; whorls 9, rather flattened, 

 the last not narrower, having a very obtuse white basal keel, 

 convex below the keel. Aperture subquadrangular, scarcely 

 one-third the length. Columella having an ascending fold. 

 Peristome flattened, thin, white, the right margin arcuate, 

 columellar margin dilated. Length 13, dianu 5 mm. ; aper- 

 ture 4 mm. long, 4 wide." (Mart.} 



Haiti: environs of Jeremie (Weinland); Plaisance (H. 

 Rolle) . 



M. angidatus W. & M., Malak. BL, vi, p. 56 (1859). PPR., 

 Monogr., vi, p. 345. CROSSE, J. de C., 1891, p. 132. 



