170 MICROCERAMUS. 



with corneous. The whorls of the spire are very finely, closely 

 striate, when unworn, and there is no trace of an angle on the 

 well rounded last whorl. It is related to M. costellaris, 

 differing chiefly in the faint sculpture and thinner shell. 

 M. nigropictus differs by its angular periphery. 



18. M. NIGROPICTUS ('Gundl.' Pfr.). PL 27, figs. 37., 38, 39. 

 Shell imperf orate, straightly conic, rather solid, white, with 



a series of dark oblong spots forming an interrupted band 

 above the periphery and suture, sometimes wanting, the 

 apical whorls black. Surface glossy, faintly marked with 

 growth-lines except on the upper part of the spire, which is 

 finely, sharply striate. Whorls 8, but slightly convex, the 

 last strongly angular at the periphery. Aperture oblique 

 rounded-squarish, the peristome not expanded, somewhat 

 thickened; columella vertical, reflexed and adnate above. 



Length 6.5, diam. 3.5 mm. 



Length 7, diam. 4.3 mm. incl. lip; whorls 8% (type). 



Western Cuba: Portales de Guane and Guirade Luis Lazo 

 (Wright). 



Macroceramus nigropictus Gundl. mss., PFR., Malak. Bl., 

 xi, 1863, p. 17, no. 74, and p. 127; Monogr., vi, p. 355. 

 ARANGO, Fauna, p. 86. 



Near M. costellaris and M. latus, but quite distinct by its 

 glossy surface and angular periphery. 



19. M. MACULATUS (' Wright ' Pfr.). PL 27, fig. 35. 



Shell slightly subperforate, trochiform, rather thin, ob- 

 liquely plicate; corneous, irregularly maculate with white. 

 Spire a little concavely conic, the apex rather acute. Whorls 

 7%, convex, the last somewhat acutely carinate, a little con- 

 vex below. Aperture diagonal, subangulate-lunar ; peristome 

 simple, the upper margin shortly expanded, basal margin a 

 little reflexed. Length 7, diam. 4.3 mm., apert. scarcely 3 

 mm. high. (Pfr.) 



Western Cuba: sugar plantation Quinones, dist. of Bahia 

 Honda (Wright). A variety on the highest peak of the Pan 

 de Guajaybon (Gundlach). 



