122 MACROCERAMUS, HAITI. 



Group of M. lineatus. 



3a. M. SIGNATUS var. SALLEANUS Pilsbry, n. v. PL 23, figs. 



59, 60. 



Shell very shortly rimate, long ovate-conic, with the out- 

 lines of the spire straight or slightly convex; thin, cream- 

 white, with a brown band below the periphery, upon which 

 stand goblet-shaped markings., faintly ocellate in the swollen 

 upper part of each ; sometimes brownish oblique streaks across 

 the whorl pass through each of the goblet-shaped spots, which, 

 moreover, may be irregular or interrupted. Base with no 

 umbilical marking, but usually with a median band or row of 

 spots. Protoconch brown or blackish-brown. Surface lightly, 

 finely striate, the suture minutely crenulate, becoming almost 

 smooth at the lower whorls. Whorls 10 to 11, only slightly 

 convex, the last well rounded. Aperture rounded, the lip 

 thin, expanded ; columellar margin dilated, somewhat reflexed. 



Length 16, diani. 6, length apert. 4.4 mm. 



Length 13.6, diam. 5.5, length apert. 4 mm. 



Length 12, diam. 4.8, length apert. 3.6 mm. 



Santo Domingo (Salle, Gabb). 



Bidimus guildingi var. g. minor, litturis rarioribus, PFR., 

 Monogr., iii, p. 363. 



This strongly marked race, of which 21 specimens from 

 several sources and collectors are before me, seems to be con- 

 stant in its differentiation from signatus; but certain forms of 

 that species from Anguilla and Anageda have undergone a 

 similar reduction of the markings. The small size, usually 

 13 to 14 mm. long, is characteristic; only one shell of the 

 series before me exceeds 15 mm. long. 



4. M. LINEATUS (Bruguiere). PI. 23, figs. 55, 56, 57, 58. 



Shell shortly rimate, turrite, with straight lateral outlines. 

 White, with a blackish-brown band below the periphery, bor- 

 dered above by a white band. Above this there are five or six 

 brown spiral lines, which are intensified and coalescent where 

 UK tj cross numerous subvertical dark streaks, which are irreg- 

 ularly spaced, and are continued on the base as continuous 



