EUCHELUS. 441 



spire, ventricose, with delicate, highly elevated spiral rib-strise,- of 

 which there are about 5 on the upper and 10 on the last whorl. 

 The surface of the ribs is slightly tuberculous, and the last one over- 

 hangs the succeeding whorl so as to form a broad deep channel at 

 the suture. The interspaces have about the same Avidth as the ribs, 

 and are beautifully barred with close-set laminse ; base convex, whh 

 a small deep scalariforni umbilicus, sculptured like the spire. 

 Aperture obliquely semicircular; lip crenulated by the ribs, con- 

 spicuously sulcate w'ithin ; columella sharp, oblique, armed with a 

 fully-developed sharp tooth at base, succeeded by a deep basal 

 notch. (Gld.) Alt. 9, diam. 7 mill. 



Viti Is. ! Neiv Caledonia ! Japan f 



Tr. (Monodonta) instrictus Gould, Proc. Bost. Soc. N. H. iii, p. 

 167, 1849; U. S. Expl. Exped. Moll., p. 190, f 225.— Euehelus 

 instrictus Gld., Otia Conch., p. 245. — Turcica instricta Gld., A. Ad., 

 Ann. and Mag. N. H. xiii, (3d. ser.) p. 143, 1864.— 3Ionodonta 

 bo^ircierei Crosse, Journ. de Conchyl., 1863, p. 178, t. 4, f. 6. — Tr. 

 bourcierei Crosse, Fischer, Coq. Viv., p. 249, t. 84, f. 3. 



This little shell is conical, like E. rubra, whitish with a series of 

 brown spots below the suture, often continued as stripes to the 

 periphery. Tr. bourcierei Crosse (pi. 37, figs. 18, 19) is a synonym. 

 Specimens of it from New Caledonia are before me. Of the typical 

 form I have shells from the Viti Islands. 



E. PERSicus Von Martens. PL 39, figs. 31, 32. 



Shell globose-conoidal, perforate, granulate-cingulate, ciiiguli un- 

 equal, with a few blackish spots, 8 conspicuous cinguli on penult., 

 about 20 on last wdiorl ; interstices narrow, pitted ; suture pro- 

 found ; aperture ovate-circular, throat sulcate, corresponding to 

 the external sculpture, margin bright silvery, denticulated by the 

 terminating cinguli ; columella arcuate, white, terminating in a more 

 or less obsolete denticle ; umbilical fossa between the columellar 

 margin and the lowest cingulus shining, white. 



Alt. 17, diam. maj. 16, min. 14 mill. ; aperture, long. 11'., lat. 8* 

 mill. (Mart.) 



Nearest allied to E. atratus Gmel., pullatus Ant., and baccatus 

 Mke. Distinguished from the first by the reduced or absent colu- 

 mellar tooth and lighter color ; from the last two by the numerous 

 spirals and narrow pitted interstices. The count of spirals is not 

 very constant, because there are frequently, especially on the last 



