164 MICROCERAMUS. 



10. M. ELEGANS (' Gundl.' Pfp.). PL 27, figs. 47, 48, 49. 



Shell subperf orate, conic, thin; corneous with white flames 

 above and on the base, and a white peripheral belt, more or 

 less interrupted, the apical whorls corneous. Surface glossy, 

 several post-nepionic whorls sharply sculptured with thread- 

 like stride, part of them white; the striae becoming coarser 

 and more spaced on the last two whorls, subobsolete on the 

 base; frequently part of the striae terminate in little drop- 

 like white tubercles, just above the suture. Whorls iy 2 to 8, 

 slightly convex, the last subangular at the periphery. Aper- 

 ture oblique, rounded, the lip a trifle expanded, narrowly 

 thickened within, the columellar margin having a small tri- 

 angular dilation at the insertion. 



Length 6.3, diam. 3.8 mm. 



Length 7, diam. 4.5 mm., incl. perist. (type). 



"Western Cuba: Pan de Guajaybon, and at Hato Caimito 

 (Gundlach) and Pan de Azucar (Arango). 



Macroceramus elegans Gundl. mss., PFR., Malak. BL, xi, p. 

 18, no. 76; Novit. Conch., p. 406, pi. 93, f. 27-29; Monogr., 

 vi, p. 350. ARANGO, Fauna, p. 83. 



An elegantly marked, conic shell, differing from the fol- 

 lowing variety in being smaller, with a minute umbilical 

 chink. 



10a. Var. INFRADENTICULATUS ('Wright' Pfr.). PL 27, 



fig. 50. 



Shell imperf orate, high-conic, thin; corneous with flames 

 and patches of opaque white. Surface obliquely rib-striate, 

 each riblet ending 'below, drop-like, in a small tubercle, these 

 tubercles forming a series just above the suture, in places 

 interrupted; base nearly smooth. Spire almost straightly 

 conic. Whorls 8% to 9, convex, the last having a low, weak, 

 hardly noticeable keel just below the periphery. Aperture 

 very oblique, ovate, the outer lip a trifle expanded, colu- 

 mellar lip subvertical, narrow, not built forward. Length 

 8.5, diam. 4.3 mm. 



Western Cuba: Cayos de San Filipe, in the municipal dis- 

 trict of Vinales, Pinar del Rio (Charles Wright). 



