GASTEROPODA. 47 
mellar lip. This broad callus of the lip may have been simply a 
tortion at first. 
Figure 59, the shell above; 59a, the side; and 594, the base, en- 
larged ; 59 c, the natural size. 
HELrix Exxquata (Gould). 
Testa parva, discoidea, tenuis, lucida, glabrata, succineo-cornea, ad peri- 
pheriam rotundata, infra sub-plana, in_foveam centralem devexa : spira 
anfractibus septem arcté volutis, supra planulatis, sutura marginata 
bené impressa discretis, sptram planam efformantibus : apertura an- 
gusta, transversa ; labro simplici, portione sinistra feré horizontah, 
recedente, subreflexa. 
Helix exequata, Gouin; Proceed. Boston Soc. Nat. Hist., ii. 171. 
Sept. 1846. Expedition Shells, 19. Premrrer; Monog. Helic., i. 193. 
SHELL small, pellucid, shining, smooth, of a yellowish horn-colour, 
composed of seven closely convoluted whorls, which are flattened 
above, so as to form a perfectly level or slightly convex spire; suture 
deep and margined. Periphery broadly rounded, beneath slightly 
swollen, and gradually sloping to a rather deep, central pit. Aperture 
very narrow, most of it lower than the penult whorl, beneath which 
it extends like a narrow slit to the centre. Lip simple, slightly as- 
cending below, and retreating as it approaches the centre, where it is 
slightly recurved. In old specimens a well-marked callus unites the 
extremities. 
Diameter seven-twentieths of an inch; axis three-twentieths of an 
inch. 
Inhabits Kauai, Sandwich Islands. Couthouy. 
A very beautiful and polished symmetrical shell; beneath, it is 
like H. enterna and indentata. 
Figure 61, top of the shell; 61a, the side; and 6143, the base of 
the shell, enlarged: 61 c, natural ‘size. 
