134 



MACROCERAMUS, HAITI. 



In contour resembling M. signatus, but nearest related to 

 M. unicarinatus, tenuiplicatus and gundlachi, chiefly to be 

 distinguished from these by the much weaker angle of the 

 rounded last whorl, the more rapidly tapering cone and dis- 

 tinct columellar fold. The striation is stronger below the 

 angle. The species is unknown to me except by von Martens' 

 description and remarks, given above. 



16. M. HERMANNI (Pfeiffer). PL 15, fig. 1. 



Shell very shortly rimate, somewhat cylindric, with the 

 upper third or half tapering, slender towards the apex; 

 rather thin; white, dotted and irregularly marbled with cor- 

 neous, several early whorls brown or corneous-brown. Sur- 

 face glossy, rather irregularly and coarsely striate, the striae 

 obtuse and low. Whorls 10 to 11, slightly convex, separated 

 by closely and distinctly serrate or crenulate suture. Last 

 whorl rounded, with no trace of a basal keel. Aperture irreg- 

 ularly rounded-oval, whitish inside; outer lip very narrowly 

 expanded, a little sinuous ; columellar lip dilated. Axis slen- 

 der and distinctly twisted spirally within. 



Length 11, diam. 3.7 mm.; length apert. 2.8 mm. 



Length 10, diam. 3.3 mm.; length apert. 2.3 mm. 



Santo Domingo: Yaque (Salle, type loc.) ; high on Mt. 

 Cibao, near Matas (Hjalmarson). 



Bulimus hermanni PFR, Monogr., iii, p. 366 (1853) ; Con- 

 chyl. Cab, p. 131, pi. 42, f . 33-35 ; P. Z. S, 1852. Macrocer- 

 amus h. PFR., Monogr., iv, 689. CROSSE, J. de C., 1891, p. 132. 



Distinct by the closely crenate suture, thin texture, the 

 absence of a basal band and the corneous maculation, which 

 may be either copious or sparse. The apical 2% whorls are 

 smooth, as usual in this group. 



17. M. SUBCYLINDRICUS Pilsbry, n. sp. PL 24, figs. 82-86. 

 Shell shortly rimate, cylindric, the upper third (or half) 



tapering to the apex, which is dark brown (but light in indi- 

 viduals which have vacated the apical whorls). Cream- 

 whitish, usually somewhat brown tinted in places, irregularly 

 and rather copiously streaked with corneous-brown, the base 



