442 EUCHELUS. 



whorl, intermediate smaller ones developed. The long groove 

 between the columellar edge and the lowest spiral reminds one some- 

 what of Lacuna; it is not so deep as in atratus, and is porcelain- 

 white, not silvery as that of atratus largely is. (Mart.) 



E. GEMMATUS Gould. PL 11, figs. 54, 55. 



Shell small, globose conic, solid, thick, pinkish, or ashen-pink, 

 irregularly dotted or longitudinally striped with dull red ; spire 

 short, acutely conic ; sutures narrowly canaliculate ; whorls 5, convex, 

 encircled by numerous closely finely granose riblets, usually 12-14 

 in number on the body-whorl, the interstices with oblique raised strise 

 or not visibly sculptured. Body-whorl rounded, globose; mouth 

 rounded, outer lip thick, lirate inside ; columella short, straightened, 

 obtusely subtuberculate in the middle, ending in a projecting tooth, 

 between which and the basal margin there is a deep narrow notch ; 

 umbilicus narrow. 



Alt. 6, diam. 5* mill. 



Sandwich and Viti Is. ; Upolu. 



Trochus (Monodonta) gemmatus GOULD, Proc. Bost. Soc. Nut. 

 Hist, ii, p. 27, 1845. 2V. gemmatus Gld., FISCHER, ( 1 oq. Viv., p. 

 241, t. 82, f. 3. 



The above description was drawn from a Sandwich Id. specimen. 

 The ground-color varies from nearly white to ashen-pink. On the 

 darker forms the dots are obscure, and they appear unicolored, of a 

 dingy pinkish hue. There seems to be great variation in the number 

 and development of the spiral grained riblets. The ribs sometimes 

 alternate in size on the median part of the last whorl, three being 

 slightly larger. Most of the specimens I have seen are decidedly 

 smaller than the measurements given above, averaging alt. 4-5, 

 diam. 4 mill. 



E. LACTEUS Philippi. PL 57, figs. 37, 38. 



Shell small, subglobose, umbilicate, milk white; whorls convex, 

 the upper ones showing 3 series of nodules, the last 9-10 series ; sut- 

 ure profound ; umbilicus margin entire; columella scarcely solute 

 above, with a denticle at base. (Phil.) Alt. 23, diam. 3 mill. 



Friendly Islands. 



Monodonta lactea PHIL., Archiv. f. Naturg. 1845, i, p. 66. 

 Trochus lacteus PHIL., Conchylien Cab., p. 83, t. 14, f. 16. 

 Said by Philippi to be full grown, but probably not so. 



