MARINE ZOOLOGY 



DORIDIDVE 



176. Archidoris tuberculata, Cuvier.* 

 Rather rare ; upon rocks at low water. 



Hastings. 



177. Jorunna jobnstoni, 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. jEgirus punctilucens, d'Orbigny.t 

 Brighton. 



179. Palio /essoni, d'Orbigny. 



A single specimen obtained of this 

 species agrees with Alder and Hancock's 

 description in having short tentacles with 

 ten or twelve laminae, 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 /fssoni, 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. 



1 80. Polycera quadrilineata, Muller. 



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 



I 105 



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. 



1 8 1 . Acanthodoris pilosa, Mtlller. 



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 bi/ame//ata, 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. Lamellidoris diaphana, Alder and 

 Hancock.t 



Brighton. 



184. Goniodorii nodosa, Montague. 

 Animal f 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. 



