GASTEROPODA. 95 
semilunate, made very small by a deep constriction just behind the 
lip, which is sharp, and very slightly reflexed, so that the opening 
seems thrust somewhat across the base of the shell. 
Axis three-twentieths of an inch; breadth seven-fortieths of an inch. 
Found on the mountains of the Sandwich Islands. Oahu, Pickering, 
Case. Maui, Drayton. 
Very remarkable for the abundant golden-yellow callus, which forms 
a tongue-like projection across the base of the shell. 
Figures 114, 114 a, 114 3, three views of the shell, enlarged; 114, 
natural size. 
Hericina Mavcertz (Gray); Zool. Journ., i. 251. Sowersy ; Thes. 
Conch. f. 55. 
ANIMAL cream-coloured, very minutely punctate with pale brown. 
Found at Tahiti at an elevation of 200 to 3000 feet, and at Tutuila. 
Couthouy. 
Figure 112, shell, with the animal, magnified one-fourth. 
HELICINA BERYLLINA (Gould). 
Testa sohdula, depresso-conica, infra convexa, ad peripheriam obtusé 
angulata, polita, albido-virens: spira anfractibus quinque planulatis, 
ultimo cito crescente; sutura lineart: apertura magna, transverse 
semi-elliptica ; peristomate simplici ; callo columellari late expanso. 
Helicina berylina, Gouin; Proceed. Boston Soc. Nat. Hist., ii. 202. 
March 1847. Expedition Shells, 37. 
Animat bright yellow ochre, darker on back of head. 
SHELL rather large and solid, depressed, about equally convex above 
and below, smooth and polished, white, tinged with beryl-green, espe- 
cially at apex, and at the margin of the callus, also arranged somewhat 
