HELIX-CHLORITIS. 253 



thin, narrowly expanded, baso-columellar margin more broadly 

 expanded, subreflexed. Alt. 13. greater diam. 21, lesser 17 mill. 



Islands of Ugi, Faro, New Georgia, Ysabel, Solomon group. 



H. eustoma PFR., P. Z. S. 1856, p. 383; Mai. Bl. 1856, p. 243; 

 Novit. Conch, i, t. 38, f. 3-5. DOHRN, Continuation Conchyl. Cab. 

 p. 572, t. 169, f. 1-3. SMITH, P. Z. S. 1885, p. 594. 



A light thin species with flat or nearly flat spire, very deep 

 sutures, the base prominently angulated. Mr. E. A. Smith considers 

 H. erinaceus a synonym ; but Dohrn has, I believe correctly, retained 

 them separate. 



H. DENTRECASTEAUXI Smith. PL 68, figs. 89, 90, 91. 



Shell depressed, narrowly umbilicated, light brown, marked with 

 fine lines of growth, and everywhere finely punctate, and probably 

 pilose in a fresh condition, spire slightly sunken below the body- 

 whorl. Volutions 5, convex above, separated by a deepish suture, 

 slowly enlarging ; the last somewhat inflated, a little descending an- 

 teriorly, having two indentations one, elongate, about the middle of 

 the whorl, at a short distance from the lip, the other nearer the 

 labrum, just under the base, both forming denticular prominences 

 within. Aperture oblique, narrowly lunate. Peristome whitish, 

 thickened, reflexed everywhere, the extremities being united by a 

 thin callosity spreading over the whorl. (Smith.') 



This remarkable species is readily distinguished from its allies by 

 the peculiar indentations on the body-whorl forming within the aper- 

 ture pseudo-denticles. As compared with Pfeiffer's figure of H. 

 eustoma, also from the Admiralty Islands, it will be seen that this 

 species has a more depressed spire, a narrower umbilicus, and a nar- 

 rower aperture. (Smith.') 



Wild Island, Admiralty group. 



H. (Chloritis) dentrecasteauxi E. A. SMITH, P. Z. S. 1884, p. 265, 

 t. 22, f. 6, 6b. 



H. URSINA Pfeiffer. PL 32, figs. 56, 57. 



Shell umbilicated depressed, rather thin, striatulate, and under a 

 lens seen to be punctulate, scarcely shining, deep brown. Spire 

 very shortly conoidal, vertex minute. Whorls 5J, moderately con- 

 vex, the last large, inflated, not descending, subcompressed around 

 the narrow perforate umbilicus. Aperture oblique, lunate-oval, 

 lilac, with a pearly luster inside. Peristome thin, margins distant, 



