INDIAN NUDIBRANCHIATE MOLLUSCA. 119 
which is pale. Dorsal tentacles conical, finely laminated on the upper part; the 
laminz meeting in front, dark yellowish, much and minutely freckled, especially below; 
retractile within short sheaths. Oral tentacles linear, pointed. Branchial plumes six, 
large, quadripinnate, minutely speckled with dark brown: the circle open behind: 
anus large and tubular. Foot broad, ovate, reddish brown, with darker blotches, and 
pale towards the margin: it is deeply grooved in front, but not notched ; the posterior 
end short and rounded. Length 5 or 6 inches. 
Tongue as in D. tuberculata, with a prehensile collar. 
Spicula very numerous, small, and rather irregular in form ; but usually bent in the 
centre, with the extremities obtuse, sometimes a little enlarged. 
Mr. Elliot informs us that this species is so brittle that it breaks to pieces even when 
alive. ‘The two specimens preserved are much mutilated. It is not uncommon, and 
bears some resemblance to the D. bellicosa of Kelaart, from which it differs in size and 
colour, as well as in the obtuse form of the tubercles. The spawn is white, and in the 
form of a single irregular coil, with the free margin much contorted. 
Doris argouata, n. sp. (Pl. XXX. figs. 1, 2, 3.) 
Body oval, convex, gelatinous. Cloak ample, very rugose and warty, covered with 
irregularly rounded, minutely tuberculated nodules of a yellowish or reddish-brown 
colour. Two or three irregular rows of deeply depressed smooth areas run down each 
side of the back, each depression having a large circular black spot in the centre, with 
a light margin, and the rest of the area greenish. The spots of the intermediate row on 
each side are largest: a slightly elevated nodulous ridge runs along the centre of the 
back, generally rising into a conical protuberance in front of the branchiz, most con- 
spicuous in young individuals, Under side of the cloak dark-purplish brown. Dorsal 
tentacles clavate, and a little bent backwards ; the laminz alternately large and small, 
nearly continuous in front ; they are retractile within cylindrical sheaths of the same 
rugose character as the cloak, sinuated at the margins. Oral tentacles small, linear. 
Branchial plumes five, large, quadripinnate, brown, with a strong midrib and branches 
of a paler colour ; the circle is incomplete behind. Foot rather broad, with a large 
strongly notched lamina in front. Length 6 inches. 
Tongue as in D. tuberculata ; no collar. The minute pallial tubercles are spiculose. 
Rather rare. Three or four specimens are preserved in the collection. 
This fine Doris is remarkable from its size and the sculpture and markings of its 
cloak. It is extremely soft and gelatinous, contracting very much in spirit. {n several 
of its characters it comes near to the D. spongiosa of Kelaart. 
Doris viLtosa,n. sp. (Pl. XXXII. fig. 1.) 
Body broadly oval, a little convex. Cloak ample, slightly sinuated at the margin, 
covered with irregular tubercles, the smaller ones clavate, the larger papillose, and fre- 
VOL. V.—PART III. R 
