434 EUCHELUS. 



Allied to E. asper, but with fewer, larger cinguli. The coloration 

 of black stripes or spots on a yellowish (or white) ground is char- 

 acteristic. 



E. STELLIO Fischer. PI. 38, fig. 23. 



Narrowly, obliquely perforate, conoid, thick, chestnut colored, 

 dotted with white, reddish and black ; whorls 5, convex, separated 

 by an impressed suture, the first smooth, following rough, spirally 

 cingulate, the cinguli granose, unequal, 5 more prominent ones on the 

 penultimate whorl, with smaller intermediate granose lirse ; last 

 whorl rounded ; aperture ovate, lip plicate within ; columella arcuate, 

 simple, edentulous. Alt. 16, diam. 16 mill. (Fischer.) 



Habitat unknown. 



Trochus stellio FISCHER, Journ. de Conchyl. 1878, p. 63; Coq. 

 Viv., p. 290, t. 93, f. 3. 



This does not seem to be a wholly adult shell. The description 

 and figure recall to me immature specimens of E. pullatus. 



E. PRINCIPALS Pilsbry. PI. 67, fig. 83. 



Shell large, globose-conic, very thick and solid, imperforate, uni- 

 form ashen ; spire short, acute, each whorl with a delicate carina im- 

 mediately above the narrowly channelled suture ; whorls 5 to 6, 

 convex, covered with minutely granose, spiral riblets, slightly un- 

 equal in size, but none of them prominent, the interstices seen under 

 a glass to be densely lamellose-striate ; penultimate whorl with about 

 18-20 spirals. Last whorl large, globose, rounded, descending to- 

 ward the aperture, base convex ; aperture rounded, quite oblique, 

 silvery within ; outer lip very thick, finely crenulated, columella 

 curved, ending in a small tooth ; columellar lip continued across the 

 parietal wall in a thin wrinkled layer, the peristome in adult shells 

 crenulate or wrinkled all around. 



Alt. 27, diam. 24 mill. ; alt. 25, diam. 22 mill. 



Habitat unknown. 



This is the largest form of EucJielus I have seen. The sculpture 

 consists of fine, beaded riblets, slightly unequal in size, much smaller 

 than in E. atratus or E. asper. The whole shell is more regular 

 in outline and smoother than the latter species. Two specimens of 

 unknown origin are before me. I cannot tell whether this has been 

 described by A. Adams or not. His descriptions are wholly in- 

 sufficient for identification. 



