126 MACROCERAMUS, HAITI. 



Length 18.7, diam. 7.3 mm. ; length of apert. 6 mm. 



Length 18, diam. 7 mm. ; length of apert. 5 mm. 



Santo Domingo (Gabb). 



Closely related to M. lineatus in shape and sculpture, but 

 conspicuously unlike in pattern of coloring. The pattern of 

 the base (fig. 51) is peculiar. 



Group of M. tenuiplicatus. 

 1. M. DOMINICENSIS Crosse. PI. 23, figs. 48, 49. 



' Larger (than signatus Gldg.), with yellowish chestnut- 

 fulvous streaks, which are transversely striated with white. 

 Length 18, diam. 8y 3 mm." (Pfr.) 



Haiti (Pfr.). 



Bulimus guildingi, var. 1, PFR., Conchyl. Cab., Bui., p. 129, 

 pi. 42, f. 13-15. Macroceramus signatus, var. b, dominicensis 

 CROSSE, Journ. de Conch., 1891, p. 131. 



Crosse has given a name to the form figured by Pfeiffer, 

 which is still without adequate description. He says that it 

 has been collected by Hjalmarson in the neighborhood of 

 Puerto Plata and of Jamao, on tree trunks. Typical M. sig- 

 natus is quite a different thing, and has not been found in 

 Haiti or Santo Domingo. The Cuban M. clerchi seems to be 

 marked somewhat like dominicensis. 



8. M. FORMOSUS (Wood). PI. 22, figs. 29, 30, 31. 



Shell shortly but deeply rimate, oblong-ovate, solid. White, 

 marked with brown spots in obliquely vertical rows, usually 

 three spots in a row, formed by the wide interruption of three 

 bands; the spots sometimes united by lines, enclosing a pair 

 of white spots; the last whorl has five spiral bands, the 3 

 upper ones interrupted, the lower bands usually continuous 

 and crossed by several radial streaks ; summit becoming blue- 

 black and then black on the glossy 2% nepionic whorls. Sur- 

 face but slightly glossy, densely and finely striate above, 

 smoother on the later whorls. Whorls about 10, moderately 

 convex, the last rounded and without trace of a basal keel. 

 Aperture vertical, the outer lip thin, a little expanded, colu- 

 mellar lip dilated. 



