66 TROCHUS. 



granose-lirate, usually with every second rib articulated with dots 

 of white or black or both; whorls about 6, the upjjer ones nearly 

 fiat, the penultimate and last convex, the former with 7 or 8 spiral 

 distinctly granose lirte, the last with about 18, of which the 7th 

 usually is upon the periphery, interstices finely obliquely striate ; 

 last whorl deflected anteriorly, rounded at the periphery ; base some- 

 what convex ; aperture oblique, small, contracted ; outer lip bearing 

 within a strong tooth above, and an inconspicuous rather acute 

 thread at the place of the periphery; basal lip expanded, curved, 

 slightly denticulate ; columella very oblique, slightly tortuous above 

 and very deeply entering, terminating below in a strong plicate, 

 tooth, and with a smooth margin, save for a small denticle im- 

 mediately above the basal tooth ; parietal tract wrinkled ; uml)ilicus 

 with a plicate-denticulate border. Alt. 10-12, diam. 12-15 mill, 



Australia, Port Jackson ; Watson's Bay; New Caledonia; Viti Is. 



T. clangnloides Wood. Ind. Testaceo. suppl., t. 6, f 39. — Fischer 

 Coq. Ftv., p. 369, t. 113, f 2. 



In the typical form, the 1st, 3d, 5th, 7th and 9th line, and one or 

 two upon the base are articulated with black. A tray of specimens 

 from the Viti Islands, received from the late Andrew Garrett, differ 

 in having only the 3d and 7th lirse, and one upon the base so marked. 

 I need not compare clangnloides with T. persouatus and its allies, — 

 species with similar strongly developed teeth — for the deeply enter- 

 ing columella of the present species at once sej^arates it. 



T. ROBERTSi Pilsbry. PI. 13, fig. 4-7. 



A form similar in color-pattern and sculpture to T. clangnloides, 

 l3ut differing notably in the greater altitude, more turbinate form, 

 and greater development of the teeth ; in these characters it is like 

 T. stigmatarius, which is, however, quite different in coloration. The 

 spire is elevated conical, the apex tinged with orange ; the upper 

 whorls are nearly flat, separated by a' linear suture, w^hich becomes 

 more deeply'impressed at the last whorl; the body-whorl is slightly 

 convex, rounded at the periphery, deeply deflected and flattened 

 toward the aperture ; the base is rather flattened, about as in T. 

 clangnloides ; the sculpture consists of spiral series of closely set 

 rounded granules, the series or cinguli a little separated on the upper 

 surface, closer beneath ; these number 17 or 18 upon the last wdiorl, 

 the 7th being upon the periphery, just as in T. clangnloides ; the 

 interstices between lirae are finel}' obliquely and spirally striate, the 



