iqoq.] 
N. Annandai^e : The htdiaii Cirripedia Pedunculata. 
69 
SYSTEMATIC ACCOUNT OF THE INDIAN SPECIES. 
Subfamily OXYNÀSPIDINÆ. 
Genus Oxynaspis, Darwin (1851). 
Eepadidæ with five calcified valves, which are covered (as well as the peduncle) 
by a membrane bearing horny spines. The valves themselves bear minute 
calcareous projections corresponding to the spines. The umbo of the scutum 
is on the occludent margin. Mandibular teeth sometimes pectinated ; edge 
of maxilla with an excavation but not regularly scalariform. No lateral 
appendages; anal appendages (if present) short, bearing a terminal bunch 
of hairs, by no means claw-shaped. Prosoma feebly developed or absent. 
Darwin was of the opinion that the spiny membrane which covers the whole 
surface in this genus, did not belong to the barnacle but to the horny coralline to 
which it was attached. Other writers have followed him in this view, which, despite 
the great weight of his authority, I am forced to consider incorrect after an examina- 
tion of a considerable nurnbër of specimens of an Indian form. Some of these were 
fresh, others dry, and others preserved in spirit and formalin. The Antipatharian to 
which they were attached bore no spines on its surface similar to those which covered 
the barnacle, and the spines corresponded exactly with the calcareous projections on 
the valves. Moreover, the Antipatharians were of a neutral blackish tint, while the 
membrane was purplish red. In my specimens the whole of the membrane was ex- 
tremely thin, and there were no signs of the surface being covered by a ‘‘ horny muri- 
cated bark ” — a description, indeed,, hardly applicable to any part of the particular 
species of Antipatharian to which the specimens were fastened. 
Hitherto the genus Oxynaspis has been known from the Atlantic and Pacific. 
The discovery, therefore, of a species in shallow water in the Bay of Bengal is particu- 
larly interesting. It must be remembered, however, that the Atlantic species are very 
rare and that others will probably be found in intermediate localities. 
Oxynaspis celata, Darwin, subsp. indica, nov. 
Capitueum laterally compressed, sharply pointed and slightly retroverted at the 
apex, about half as broad as long. The inner membrane deep brownish purple ; the 
body of the animal and the pedicels of the cirri covered with pigment spots of the 
same shade; the rami of the cirri, except at the extreme base, milky white. Valves 
thick, deeply tinged with orange-red ; the spines on the membrane covering them of 
the same colour but darker ; the surface of the valves ornamented with strong ridges 
radiating from the umbo and also with numerous minute rounded prominences corres- 
ponding to the spines on the membrane ; the distal ends of the ridges produced so as 
to form well-marked rounded projections on the edges of the valves. Ter gum triangu- 
lar, the apical and carinal angles acute, the occludent angle greater than a right angle ; 
the extreme length of the valve about twice that of its occludent margin ; the 
