GASTEROPODA. 329 
nated, the valves not beaked, of a pale lemon-yellow ground colour, 
reticulated along the centre, with delicate, angulated, pale-violet lines ; 
these areas are also rugosely lineate-punctate longitudinally, especially 
toward the margin; lateral areas very prominent, rugosely granulate, 
and with about four, fine, radiating stri#; posterior valve acutely 
umbonated and crossed by an acute, transverse rib. Margin cream- 
coloured, very finely granulate-imbricate. 
Length half an inch; breadth two-fifths of an inch. 
Inhabits Kauai and Oahu, Sandwich Islands. 
A very delicate and beautiful shell, its markings resembling the 
venated petals of some flowers. I know of no other species nearly 
resembling it. 
Figure 435, back of the shell; 435a@, the sculpture, magnified ; 
435 6, natural size. 
CuiTon pissJuNcTUS (FREMBLY), Zool. Journ., iii. 193. ReEEve; 
Conch. Icon., f. 21. 
The margin of this species is nearly as broad as the valves, except 
posteriorly, where it is narrowed and distinctly cleft. It has a rich 
mahogany colour, banded at irregular intervals with series of light- 
coloured oval dots ; over the whole are sprinkled clusters of small azure 
and green specks, making the margin very brilliant and beautiful. 
Under side dark ochre passing into red. Branchie very large and 
thick, extending to near the anus; anal tube large and prominent. 
Head large, the frontal veil separated from the buccal mass by a deep 
sinus, prolonged on each side into a compressed conical lobe. [3. Pp. c.] 
Taken at Villamar, Chili, where it attains a large size. 
Figure 417, the animal from beneath. 
CHITON ATRATUS (SowERBY), Mag. Nat. Hist., 1840. Conch. IlIlustr., 
f. 57, 58. REEvE; Conch. Icon., 103. 
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