VENERIDA. 147 
V. nodosa, Dunker,; Reeve, Conch. Ic. f- 57; V. tuberosa, 
Deshayes, Cat. Conch., Brit. Mus., p. 99. Cordato-globose, inequila- 
teral, thick, solid, chaffy, with regular, concentric, thick, convex, broad, 
tuberculous ribs ; tubercules unequal, the posterior ones larger, obli- 
quely diverging, median obsolete; umbones large, swollen, cordate, 
longitudinally striated; lunule brown, broadly cordate, flat, im- 
pressed, finely striated ; ligamental area excavated, elongato-lanceolate ; 
marked with large transverse spots (Deshayes.) 
New Zealand (British Museum.) 
Reeve states that this shell comes from West Africa, which is_pro- 
bably correct. 
V. oblonga, Hanley; Reeve, Conch. Lc., f- 1 ; Smith, Voy. Erebus 
and Terror, pl. 2, f-1; V. zealandica, Gray, Dieff., N.Z., i., p. 249 (not 
of Quoy and Gatmard.) Ovato-cordate, ventricose, solid, with close, 
regular, slightly elevated, concentric laminz, which are higher at each 
end ; lunule large, ovato-cordate ; margin finely crenulated ; brown or 
brownish-white ; interior white. 
Height, 1°8 ; length, 2:3. 
Auckland to Dunedin. Auckland Islands. 
V. crebra, Hutton, C.M.M., p. 70. Ovato-cordiform, sub-trigo- 
nal, very thick, swollen, with rather close concentric striz, which are 
crenulated at the anterior end by fine transverse striz ; posterior end 
truncate; umbones large, much curved forwards; lunule cordate, 
pallial sinus short, broad, trigonal, deeply margined ; brown ; interior 
white. 
Height, 1°75 ; ie TQ); 
North Island. 
Genus, CHIONE—Muhlfeldt. 
Mantle margins plicato-dentate ; siphons short, broad, unequal and 
united at the base, the branchial with two rows of cirri, the anal 
ciliated. Shell oval, sub-trigonal ; hinge with two or three cardinal teeth 
in each valve, but'no anterior lateral tooth; pallial sinus short, broad, 
triangular. 
C. lamellata, Zamark, Anim. sans vert.. vi. p. 349; Reeve, 
Conch. Ic., f- 78; Chenu, f. 368. Oval, angled in front, with distant 
transverse lamellz which are striated on the outside, and recurved and 
fringed in the adult ; white. 
Height, 1°5 ; length, 2°25. 
Auckland (Cheeseman). S. Australia and Tasmania. 
C. yatei, Gray, Dief: N.Z, i., p. 250; Reeve, Conch., Ic., f. 84, 
Voy. Erebus and Terror, pl. 3, f- 113 V. lucastt, Homb. and Jacgu. ; V. 
calcarea, Gould. U.S. Ex. Ep. Ovate, sub quadrate, compressed, inequi- 
lateral ; anterior end short, sub-angulated ; posterior truncated ; with 
thin, concentric, erect, distant lamella, which are much higher and 
