SOLEMYID#, 157 
distant lateral tooth ; the other with a single concave cardinal and a 
distant lateral tooth ; ligament internal or sub-marginal. 
K. cycladiformis, Deshaves, Trait tim., pl. 11, ff. 6-9, P.Z.S., 
1855, f. 181 (Lryeina.) Shell ovato-sub-rotund, swollen, inequilateral, 
smooth, shining, clothed with a thin glaucous grey epidermis, iridescent, 
transversely finely and irregularly striated ; anterior side shortly obtuse ; 
valves thin, translucent ; hinge very narrow, cardinal teeth two in the 
left valve, minute, disjoined at the base, unequal ; lateral teeth remote ; 
anterior muscular impression very small, circular, the posterior oval, 
continuous with the pallial impression (Desh.) 
North Australia. (Jukes.) New Zealand. (Quoy.) 
Genus, PYTHINA—Hinds. 
Equivalve, equilateral ; umbones small; left valve with two small 
unequal teeth and two strong lateral teeth ; right valve with a small 
central tooth, and two bifid lateral teeth ; two ligaments. 
P. stowei, Hutton, CMM, p. 76. ‘Transversely oval, thin, 
white, pellucid, with rather strong ribs divaricating from the centre and 
crossed towards the margin by a few distant concentric grooves ; inter- 
stices slightly rugose ; margin crenulated at each end. 
iemht,.-3)5 length;. <5. 
Islet Reef, Cook Strait, two left valves only. Auckland. (Cheese- 
man.) 
FAMILY—SOLEMYID:. 
Palpi very small and slender. Mantle closed, except at a large 
opening with cirrated edges, anteriorly, for the passage of the foot, and 
at a small opening at the posterior extremity, also cirrated. Gills form- 
ing a very thick lobe on each side, situated far posteriorly, and having 
a longitudinal sulcus in the middle of each. Foot large, truncated and 
excavated at its extremity, which has fimbriated edges. Shell elongated, 
equivalve, very inequilateral, gaping, invested in a thick epidermis. 
Genus, SOLEMY A—Lamark. 
Shell cylindrical, ligament concealed, pallial line obscure ; umbones 
posterior ; one compressed very oblique cardinal tooth in each valve ; 
epidermis dark and horny, extending beyond the margin. 
S. parkinsoni, Smth, Voy. Erebus and Terror, Moll., p. 6, pl. 3, 
f-1; Reeve, Conch. Ic., f. 4. Dark brown, rayed with paler, interior 
greyish. 
Height, -7 ; length, 19. 
Stewart Island to Auckland, 
Dental callosity moderately broad, and prdouced acutely awards 
the shorter or posterior side of the valve (not truncated as in S. aus- 
tralis ;) the extension of it within the valve is thin, nearly separated 
from it at the base by a depression ; the transverse expansion of the 
