316 Messrs. Alder and Hancock on Nudihranchiate Mollusca. 



T""^ Eolis amcena. 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. Branchiae linear or slightly elliptical, of 

 a warm green spotted with white, brownish towards the base, and 

 a faint yellowish white ring near the apex. They are set in eight 

 transverse rows ; each row has three, sometimes four papillse 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 little Eolis 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. 

 Branchiae 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 

 a ring 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 

 papillse gives this species a very elegant appearance. 

 V" Eolis 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. 

 Branchiae elliptical, much inflated one way and somewhat de- 

 pressed the other, set in nine or ten rows of four papillse each ; 

 the gland linear, purple, granulated ; apices with a broad ring of 

 pale orange-red. Foot transparent, linear, rounded in front, and 

 a little widened for a considerable way backwards. Length three- 

 eighths of an inch. 



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 branchiae. 



