124 MACROCERAMUS, HAITI. 



slightly umbilicate. Whorls 13 to 14, flattened, longitudin- 

 ally rib-striate and marked with dark brown streaks ; the last 

 whorl encircled by a brown zone. Aperture rounded. Length 

 15 mm." (Petit.) 



Haiti: Gonaives (Dr. Richaud, H. Rolle). 



M. richaudi PETIT DE LA SAUSSAYE, Journ. de Conchyl., i, 

 p. 377, pi. 13, f. 4 (1850). PFE., Monogr., iv, p. 688.- 

 CROSSE, J. de C., 1891, p. 132. Bulimus richaudi Petit, PFR., 

 Monogr., iii, p. 364. 



The original figure is copied, pi. 24, fig. 76. Fig. 75 is a 

 large typical example. The lateral outlines are nearly 

 straight, only a trifle convex. It is somewhat coarsely striate, 

 the striae subobsolete except near the sutures, on the lower 

 whorls. The early whorls are brown, and the rest are marked 

 with narrow brown streaks at unequal intervals; some of the 

 spaces between these color-varices being white, some faint 

 lilac ; and there are a few irregular dots scattered about. The 

 base is radially streaked with chestnut, and defined by a dark 

 brown band, above which there is a white border, indicating 

 the place of the wanting keel. There is a small brown patch 

 in the umbilicus. The expanded, thin lip is white, the throat 

 ochre-brown or red-brown, paler in the base. The specimen 

 illustrated in fig. 75 measures: length 20, diam. of last whorl 

 above aperture 5, length of aperture 4.5 mm., whorls 14%. 

 Other specimens are smaller, with the same shape, sculpture 

 and coloring: length 14.4, diam. 4.5 mm., whorls 11%. 



In a few shells before me the narrow longitudinal streaks 

 are a little serrate on the upper side. These lead the way 

 toward the following form. 



5a. Var. LINEATISTRIGATUS Pils. n. v. PL 22, fig. 32. 



Shaped like M. richaudi. White, with four brown spiral 

 lines, which are faint or wanting except at their intersections 

 with the unequally-spaced, brownish, longitudinal streaks, 

 upon which they form oblong spots. Length 13.3, diam. 4, 

 apert. 3.2 mm., whorls nearly 13. Other characters as de- 

 scribed above for M. richaudi. It is more slender than M. 

 lineatus, smaller, and with fewer spiral color-lines, though 



