MACROCERAMUS, CUBA. 147 



Eastern Cuba: Imias, in the district of Baracoa (Arango). 



M. arangoi PFR., Malak. Bl., xiii, 1866, p. 60 ; Novit. Conch., 

 p. 387, pi. 89, f . 31-33 ; Monogr., vi, p. 353. ARANGO, Fauna, 

 p. 85. 



Unlike M. costulatus, the brown flames often extend up to 

 the suture. They are commonly interrupted. There is usu- 

 ally a narrow dark line below the hardly raised sub-basal 

 keel, and the second ribbed whorl of the spire is bluish or 

 purplish brown. The parietal callous is straight and not 

 very thick. It is closely related to the more finely costulate 

 M. inermis, and to M. blaini. 



31. M. BLAINI ' Arango ' Pfr. PL 20, figs. 19, 20. 



Shell subperforate, turriculate, solid, lightly striate, rather 

 glossy, white. Spire subregularly tapering, the apex some- 

 what acute; suture deep, subcrenulate. Whorls 10 to 11, 

 moderately convex, the last rounded, marked by a blackish, 

 somewhat interrupted ~band, slightly contracted in front. 

 Aperture slightly oblique, lunate-subcircular, the peristome 

 simple, unexpanded, the columellar margin dilated above, a 

 little reflexed. Length 8^, diam. 3 mm.; aperture scarcely 

 2 mm. high (Pfr.) . 



Eastern Cuba: Imias, dist. of Baracoa (Arango). 



M. blaini Arango mss., PFR., Malak. BL, xiii, 1866, p. 60; 

 Novit. Conch., p. 389, pi. 89, f . 40-42 ; Monogr., vi, p. 352. 

 ARANGO, Fauna, p. 85. 



" Belongs to the group with the last whorl contracted in 

 front, ' ' but distinguished by the sculpture, slender form and 

 coloration. I have not seen specimens. 



32. M. VARIABILIS Pfeiffer. PL 20, figs. 25-28. 



Shell subperforate, ovate-conic, solid, obliquely and rather 

 closely, strongly ribbed; whitish. Spire swollen, attenuate 

 above, the apex acute. Whorls 9, convex, the last somewhat 

 constricted in front, not ascending. Aperture small, oblique, 

 subdepressed-rounded ; peristome somewhat thickened, unex- 

 panded, continuous, adnate above and on the left side. 

 Length 7, diam. 4 mm., aperture 1.66 mm. high. (Pfr.) 



