CAPULID&. 87 
Tentacles, mantle, and foot yellow; rest of the animal white. 
(Quoy.) 
Genus, CRYPTA—Humphrey. 
Head large, transverse, depressed ; foot rounded, slightly truncate in 
front. Shell ovate, oblong; apex posterior, oblique, sub-marginal ; 
aperture elongated, polished within, the posterior half covered by a 
horizontal shelly lamina ; edge of lamina rather straight. 
C. costata, Deshayes ; Anim. Sans Vert. vii., p. 644; 0. & G., 
Le, Mies. ATA, p/.-72, f. 10-123, Chenu, 7. 2353 ;. Reeve, Conch. Ic., 
( Crepidula,) 7. 21. Shell ovate, radiately ribbed, ribs distant, flexuous, 
prickly tubercled, interstices striated; brownish-white, stained and 
lineated towards the margin with purple ; margin flexuous; internal 
appendage rather large; opal white, concave (Reeve.) 
North Island. 
Carpenter considers this species the same as as aculeata, Gm. 
(Cat. Mazatlan Shells, in the British Museum, p. 268.) 
Tentacles black at their external base; extremity of the Tea 
tentacles, and contour of the foot yellow, the margin of the mantle 
marked with the same colour ; remainder of the animal white (Quoy.) 
C. monoxyla, Lesson; Voy. Coquille, Zool., ii., p. 3914 C. contorta, 
Quoy and Gaimard, lc, i., p. 418, pli 72, f- 15-16. Shell oblong, 
elongated, slightly spiral, convex above, concave below, the right margin 
_arched, excavated in the middle, contracted in front, the left margin 
rounded ; keel convex and dorsal, slightly spiral ; apex posterior, termi- 
nal; internai lamina slightly sunk, the free margin straight, nearly 
flat and slightly striated: above; greenish-white ; interior white and 
pearly, with a greenish tint in the centre (Lesson.) 
Length, 7 lines ; breadth, 44 lines ; height, 3 lines. 
Bay of Islands to Auckland. Only found in the North. 
Animal yellow. (Quoy.) 
C. unguiformis, Zamark; Anim. Sans Vert., vii., p. 642; Reeve, 
Conch. Ic. (Crepidula,) f. 1; Chenu, f. 2360. Shell oval or oblong, flat 
or concave, often twisted, smooth, externally concentrically striated, 
sometimes covered towards the margin with a yellowish hairy epidermis, 
internally shining white; appendage rather largely septum-shaped, 
slightly notched at the side (Reeve.) 
Extremely variable in form, according to its place of attachment, 
but always thin and white. 
Auckland to Dunedin. 
For a figure of the teeth, see Gray’s ‘Guide to the Mollusca,” 
PNG: 
FAMILY—CAPULID. 
Tongue membrane winged on each side in front; teeth as in 
Calypiride. Rostrum lengthened ; tentacles subulate, with the eyes on 
bulgings at their outer bases ; mantle simple in front ; gill forming. .a 
M 
