HELIX. 79 



H. TENTORIOLUM, Gould. PL 15, fig. 32. 



Moderately umbilicated, obliquely finely striated, light greenish, 

 with a white carina ; whorls 6, flattened, periphery acutely angu- 

 lated, base inclining towards the umbilicus. Diam. 10 mill. 



Ins. Upolu. 



H. TRANSARATA, MoUSSOll. PI. 15, fig. 41. 



Narrowly umbilicated, irregularly rugosely or plicately striated, 

 brownish corneus, the plications whitish, suture linear, lightly mar- 

 gined above; whorls 5, moderately enlarging, a little convex, the 

 last not descending, with thread-like, acute carina, smoother and 

 lighter colored below, slightly convex, sloping into the umbilicus. 



Diam. 7 mill. 



Lomma-Lomma, Viti Islands. 



Var. ft is more depressed, light corneous, thinner, and unequally 

 rugosely striated, umbilicus wider. 



H. FESSONIA, Angas. PI. 15, fig. 40. 



Narrowly umbilicated, thin, closely irregularly plicate-striate, 

 light brownish, with irregularly interrupted lighter, diaphanous 

 strigations, suture pale thread-margined ; whorls 6, a little convex, 

 the last not descending, with white carina on the periphery, base flat, 

 corneous, with a narrow, brown band at the carina. Diam. 9 mill. 



Kantavu; Viti Is. 



Perhaps = the preceding species. 



H, ENTOMOSTOMA, Hombr. et Jacq. PI. 15, figs. 43-45. 



Narrowly umbilicated, striated above, greenish brown ; whorls 

 6i, somewhat flattened, margined, the periphery acutely carinated, 

 base more convex ; columellar margin tuberculately thickened 

 dilated above. Diam. 1 inch. 



Ins. Hogoleu. 



Partakes of the characters of subsection Videna. 



H. TROCHIFORMIS, Fer. PL 15, fig. 42. 



Narrowly umbilicated, solid, obliquely rugosely striated, chest- 

 nut colored or brownish yellow, dark banded, carina yellowish ; 

 whorls 6, a little convex, periphery acutely carinated. 



Diam. 16'5 mill. 



Ins. Raiatea, Tahaa, Taheiti, Moorea. 



H. drcumdata, Muhlf., is a synonym. 



H. SUBTROCHIFORMIS, Mousson. PL 15, figs. 46, 47. % 



Differs from the last species in being more discoidal, with more 



