620 EDGAR A. SMITH. 
the shell being smooth. The insertion plates are thick and striated across the edge. The anterior 
valve exhibits eight slits, the posterior ten and the median valves none. 
Family ACANTHOCHITIDAE. 
283. Acanthochites (Loboplax) laqueatus, Sowerby, 34, X/V. (Angasia tetrica, 34, XI 4) 
WoC, DING 
Testa parva, elongata, subdepressa, purpureo-rosea, albo variegata, valvis antica et postica 
pallidis, cingulo puniceo vel viridi, hic illic albo maculato, cireumdata; valvae rugose squamatae ; 
antica costis radiantibus quinque vix elatis instructa, undique squamata, medianae angustae, in 
medio postice rostratae, area dorsali sublaevi, postica undique squamata, breviter mucronata, 
Longit. 16 mm., diam, 12mm. 
This species is remarkable for its brilliant variable colour, the narrowness of the central valves 
and their coarse squamulation. 
The anterior valve in the Maldive specimens is greenish grey with five paler rays and the 
posterior margins are also whitish with one or two black spots. Central valves purplish rose with 
some whitish streaks or wrinkles on each side the dorsal area, Mantle purple red with a white 
spot on each side the first, seventh and eighth valves surrounding the lateral pores there situated, 
also some black spots set in white rings all round the edge, about 17 or 18 altogether, and with 
a fringe at the extreme margin of short white spicules. 
Another specimen has the valves similarly coloured, only the seventh is decidedly green 
excepting the rosy-purplish dorsal area. The mantle, however, is of a vivid green, with a white 
stripe on each side the anterior valve and four or five stripes or spots in front, the outer margin 
with a similar fringe of spicules. 
Valves. First valve semicircular, the posterior margins being slightly divergent, exhibiting five 
not much raised rays which, like the rest of the surface, are covered with coarse elongate scales 
which are finer towards the middle of the hinder edge. Insertion plate finely striated externally, 
acute at the edge, with five shallow slits. 
Central valves narrow, curved in front and rather acutely beaked behind; dorsal area narrow, 
smooth, with cross marks of growth; squamae arranged in rows, some parallel with the posterior 
margin, others obliquely across the valves, three or four rows on each side the dorsal area being 
white; insertion plates with a single posterior slit. 
Posterior valve semicircular, shortly mucronate, squamate everywhere, except upon the short 
mucro which of course is like the dorsal area of the preceding valve; insertion plate thickish, 
with nine slits. 
The colour of the interior of the valves of the only specimens disarticulated is a pinkish flesh 
tint, the head and tail valves being*paler than the rest. 
Tt does not seem to me advisable to place this species in the genus Angasia as distinct from 
Acanthochites. I might also point out that the name Angasia was preoccupied in Crustacea. (See 
P. Z, 8S. 1863.) 
Family CRYPTOPLACIDAE. 
284, Cryptoplax burrowi, Smith, 34,XV. IX. 
