136 MESSRS. ALDER AND HANCOCK ON 
rounded behind, and laminated but not notched in front. Length varying from 3 to 
8 inches, 
Occasionally found along the Coromandel coast. When alive, the tinting of the 
mantle is exceedingly delicate and beautiful. 
Suborder Potysrancuiata, Férussac. 
Family SCYLLAIDA, Alder & Hancock. 
Genus Scyiuaa, Linneus. 
Body compressed. Cloak produced into lateral lobes, with plumose or tufted 
branchiz scattered over the inner surface. Tentacles two, laminated, with large, com- 
pressed sheaths. Veil rudimentary. Anus lateral. Foot linear, grooved. 
Tongue broad, with numerous rows of denticulated spines. 
ScyLta#a MARMORATA, n. sp. (Pl. XXXIII. fig. 3.) 
Body rather stout, nearly linear, tapering to a blunt point at the tail; marbled with 
dark and pale brown, with a few scattered ill-defined spots of a dusky hue: a pale line 
runs down the back of the tentacular sheath and along the pallial ridge, following the 
branchial lobes, and uniting behind in a single line which passes along the margin of 
the caudal crest : a row of distant yellow tubercles runs along each side of the body, 
with a few indistinct scattered ones on the same part. Tentacles small, finely laminated, 
rising out of large wide sheaths, the posterior surface of which is expanded into an 
arched wing or crest. Branchial lobes two pairs, placed rather close together, pretty 
regularly rounded or ovate, marked with a darker belt of marbling externally, within 
the pale line already mentioned. Branchial tufts luxuriant, covering nearly the whole 
of the inner surface of the lobes, and extending a short way on each side of the caudal 
crest, which is not very large, commencing abruptly, and arching pretty regularly back- 
wards. Foot narrow, truncated in front, and pointed behind. Length 13 inch. 
This species differs from S. pelagica in colour and markings, in its smaller size, more 
rounded lobes, and less produced caudal crest ; but the species of this genus have been 
so imperfectly described that it is not easy to decide upon their specific differences. 
Three specimens have been preserved in good order. The species is stated to be 
common. 
ScYLLHA ViIRIDIS, n. sp. (Pl. XXXII. figs. 4, 5.) 
Body rather slender, linear, produced into a slender pointed tail, of a uniform greenish 
colour, with a few pale tubercles. Tentacles stoutish, rising from short sheaths, with 
