316 Messrs. Alder and Hancock on Nudibranchiate Mollusca. 
Eolis amena. Body slender, greenish or yellowish white. 
Dorsal tentacles wrinkled, long, linear, greenish with a band of 
brown and spotted with white. Oral tentacles much shorter than 
the dorsal ones, white. Branchiz linear or slightly elliptical, of 
a warm green spotted with white, brownish towards the base, and 
a faint yellowish white rmg near the apex. They are set in eight 
transverse rows ; each row has three, sometimes four papillz on 
each side: the three anterior rows are placed close together, the 
rest wide apart. The back has rich brown markings near the 
region of the heart. Foot rather slender, rounded in front, and 
not produced at the sides. Length about three lines. 
Two specimens of this beautiful httle Holis were dredged up at 
different times in Torbay. 
Allied to E. viridis of Forbes. 
Eolis elegans. Body slender, subpellucid, yellowish white. 
Oral tentacles long, tapering. An opake white line runs down 
each, and is continued across the front of the head. Dorsal ten- 
tacles not above half the length of the oral ones, stoutish, erect, 
tapering at the top and wrinkled, pale fawn-coloured or buff. 
Branchiz numerous, slender, nearly linear, set in about seven 
dense clusters on each side : the first cluster large and approach- 
ing very near the dorsal tentacles ; the remaining diminish gra- 
dually and extend very close to the tail. They are of a deep rosy 
flesh-colour, terminated above and below by a dark patch of pur- 
plish brown approaching to black, above which, on the apex, is 
aring of white. Foot slender, produced into longish angles at 
the sides. Length half an inch. 
One specimen dredged up near Berry Head, Torbay. 
The contrast of the dark spot with the white and red on the 
papille gives this species a very elegant appearance. 
Elis amethystina. Body yellowish, slightly depressed. Oral 
and dorsal tentacles of a yellowish tinge, the latter twice as long 
as the former, bases approximating, points fine and spreading. 
Branchiz elliptical, much inflated one way and somewhat de- 
pressed the other, set m nine or ten rows of four papillz each ; 
the gland linear, purple, granulated ; apices with a broad ring of 
pale orange-red. Foot transparent, lmear, rounded im front, aud 
a little widened for a considerable way backwards. Length three- 
eighths of an mch. 
Under stones at low-water mark, Cullercoats. 
This species comes near to E. tricolor, but differs from it in 
the shape of the anterior portion of the foot, in the length of the 
tentacles, and in the size and character of the branchie. 
