MARINE ZOOLOGY DORIDID^ 176. Archidoris tuherculata, Cuvier.* Rather rare ; upon rocks at low water. Hastings. 177. Jorumia johnstoniy Alder and Hancock. A large orange coloured species, nearly smooth. Taken two or three times upon rocks at low spring tides. Rather rare. Hastings. POLYCERID^ 178. /Egirus punctilucens, d'Orbigny.t Brighton. 179. Palio lessoni, d'Orbigny. A single specimen obtained of this species agrees with Alder and Hancock's description in having short tentacles with ten or twelve lamina, but the body is more ocellated, and the frill across the snout is as in var. ocellata. The body is more tuberculated perhaps than in the variety and has the line of tubercles along the head, but there are others also. The animal has the habit of spinning a thread of mucus at the tail and thereby mooring itself to some object ; it is also fond of screwing up the tail end of the foot into a regular disc, and suspending itself by it, from the surface of the water. Palio lessoni, var. ocellata. Alder and Hancock. Animal of a seaweed-green colour, covered with white or greenish white spots and tubercles. There is a single pair of tentacles which are laminated and of a green colour, in the upper part. The gills consist of three branching plumes facing backwards, and anal aperture being in the centre. Running along each side of the body from the front of the head, and terminating behind the gills in free pro- cesses is a pretty little frill. From this point, a line of white spiny tubercles runs down the centre of the tail, and similar tubercles occur generally distributed over the upper portion of the body. This variety during some years is rather plentiful upon rocks and under stones at low water, but in others it appears to be practically absent. Hastings. 180. Polycera quadrilineata, Miiller. This species has much the character of the foregoing species. The body is trans- parent white, with orange spots and spiny tubercles of the same colour down the centre of the back and tail, in the latter [05 part of which they merge to form a streak of orange. Another line of tubercles runs down each side of the body commencing in front of the head, where they form four rather long points or processes projecting forward, and running backwards as far as the side of the gills where they terminate as free processes. There is a single pair of tentacles which are laminated in the upper part. The gills are plume-like and form an incomplete rosette situated about midway down the back. Taken a few times in the trawl a mile or so distant from shore. Rather rare. Hastings. 181. Acanthodorii pilosa, Miiller. Animal nearly i inch in length, of a pale yellow or white colour. Cloak covered with rather long and conical tubercles. Not uncommon upon rocks from mid to low tide. Hastings. 182. Lamellidoris bilamellata, Linnaeus. The cloak is of a pale, or rich brown colour, and is tuberculated, the tubercles being white. The branchiae form a double rosette of plumes in the form of the letter Omega inverted ; tentacles laminated. Very common upon rocks from mid to low tide, often congregating in groups. Hast- ings. 183. Laynellidoris diapbana, Alder and Hancock.t Brighton. 184. Goniodoris nodosa, Montague. Animal | inch in length, of a pale yellow colour, excepting the back which is flesh-coloured. There are two oral ten- tacles, and the dorsal ones are laminated behind in the upper half. The free margin of the cloak is very prettily frilled and turned up and may or may not unite behind the gills which form a rosette of plumes at the end of the back. The whole upper portion of the animal is more or less dotted with opaque white, and down the centre of the back there is a keel, and upon either side a few small tubercles are arranged in line and coloured opaque white ; down the centre of the tail there is an opaque saffron- coloured ridge. This is a mud-loving species and is therefore rather local. Hast- ings. 185. Ancula cristata. Alder. Animal fully inch in length ; trans- parent white. The gills which occupy the centre of the body are formed of three branching plumes which face backwards. 14
