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Show 86 SIR C. ELIOT ON NUDIBRANCHS [May 17, of Trevelyana yet found in East Africa, 3 inches long, and stout in proportion. The colour was bright vermilion, plentifully besprinkled with slightly projecting spots of a deeper shade. The rhinophores and gills were small and deep vermilion in colour. The preserved specimen has greatly shrunk, and is 25 millimetres long, 14 high, and 11 broad. The colour is dirty white, and no spots or tubercles are visible. There is no trace of tentacles or of a mantle-edge, but the frontal veil is a distinct hard ridge. The foot is grooved in front. The tail is very short. There are 12 small gills set in a circle, bipinnate and in parts tripinnate. The vent is subcentral and not raised. Though there is nothing that can be called a labial armature, the labial cuticle is strengthened with scattered rods of various shapes. The radula is larger than usual in the genus. It consists of 36 rows, some of which contain as many as 51 teeth, so that the formula is 36 x 50 +1.0.1 +50, but the rows towards the front are much smaller. The first lateral is large and hamate (fig. 2 «), sometimes with irregular notches or denticles on the outside of the hook (figs. 2 c & 2 d). In several cases the top seemed to be broken off, and the remaining part was bifid or trifid (fig. 2 b). The other teeth are slender and hamate (figs. 2 e & 2 f ) . In all the teeth the hook is directed forwards, not backwards. The liver is greyish and not very large. In front of the liver, but quite separate from it and from one another, lie two large spherical hermaphrodite glands with a diameter of about 5 and 7 millimetres respectively. They are yellowish in colour, and the surface is covered with knob-like follicles. The verge is armed with transparent spines. The large pericardium lies in front of the branchiae, and in the alcoholic specimen is much inflated. This form is possibly the Stenodoris rubra of Pease (Am. Journal of Conch, ii. 1866, p. 206), though, if so, " light red papillae " is a strange description of the raised spots; but the account given of the animal is not sufficient to admit of identification. T r e v e l y a n a c e y lo n ic a Kel. (Plate III. figs. 3 a-2> c.) [Kelaart, Ann. & Mag. of Nat. Hist. 3rd ser. vol. i. p. 257, 1858.] One specimen from the East Coast of Zanzibar. The notes on the living animal describe it as about an inch long, creamy white, with bright red dots. The gills were yellow, with bright red lines down their backs ; larger and more feathery than is usual in the genus. There was a line of bright red round the edge of the foot. The preserved specimen is colourless, 15 millimetres long and 6'5 broad. The back is quite smooth, and there is no sign of a mantle-rim. The pericardium forms a large, much swollen prominence. The rhinophores are completely retracted. There are 12 branchiae set in a circle open behind; one is large and bifid, one is rudimentary. The foot is deeply grooved in front. No tentacles could be discerned. |