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102 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
This animal appears to be Bergh’s O. pacijica, known hitherto only by one 
specimen from the Arafura Sea. It is easily recognizable by its huge dorsal 
papille which give it a strange appearance, but otherwise it differs only 
slightly from Polycera ; it has no processes on the frontal veil, and the radula 
1S narrower. 
ProcamopHErus, /. S. Leuckart. 
(See for the genus Eliot: ‘‘ Nudibranchiata from Cape Verde Islands” in Proc. Malac. 
Soc. 1906, p. 149, and authorities there quoted.) 
The type of this remarkable genus is PJ. ocellatus described below, of 
which nothing has been known since specimens coming from the same 
locality, the Red Sea, were noticed and figured by Riippell & Leuckart in 
1828. It agrees in all essential generic characters with the species which 
have been subsequently investigated. 
PLOCAMOPHERUS OCELLATUS, Riippell 5 Leuckart. 
(Riippell & Leuckart : ‘ Neue Wirbellose Thiere des Rothen Meeres,’ 1828, p. 17.) 
Mr. Crossland’s notes on the living animal are as follows :— 
“ From 5 fathoms Suez Bay, bottom mud. 
‘In shape recalling the vermilion species from St. Vincent, Cape Verde *, 
e.y., gills in middle of back and the long tapering tail with a crest. This 
tail-crest becomes a great fleshy hump proximally. The mantle round its 
front edge develops a frill of branched processes, and below this are two 
light-coloured slightly lobed semicircular ridges. The foot is grooved and 
notched. The general colour is chocolate-brown, but gills and rhinophores, 
tips of lateral processes, &c., are very dark. Body lighter below and spotted 
with yellow, very clear (but not light) round spots. These become orange 
low down on the sides of the body. There are long whitish tentacles laterally 
with clubbed chocolate ends and small branched side processes. 
‘Much contracted on killing. 
“Tn Suakim Harbour ; several specimens found on the boxes in which live 
Pearl Oysters were kept.” 
Five specimens are preserved, one of which is very much larger than the 
others. It is 23 mm. long, 11 mm. broad across the branchiz, and 13 mm. 
high to the tip of the branchiee. The colour is a rich deep brown with some 
white mottlings. The ocelli are of a lighter shade, but with dark rims and 
one or several (2-5) brown dots in the centre. As in the specimens of 
Ploc. madere from Cape Verde, the ramose nature of the processes is much 
clearer in the smaller than in the larger specimens. In the largest specimen 
of all, hardly any trace of branching remains. About ten processes can be 
distinguished on the veil over the mouth, but they evidently have a strong 
* j.e., Plocamopherus madere. 
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