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Show 394 SIR C. ELIOT OX NUD1BRAXCHS [Mar. 1, The alcoholic specimen is high and stoutly built; length 14 mm., breadth 5, height 6. The mantle is moderately ample ; under its posterior margin it bears eight conical protuberances, four of which are very distinct and the rest smaller. There are none, however, on the anterior portion of the mantle as in the specimens described by Bergh. The branchiae are 12 and exposed in the preserved specimen. The foot is rounded in front and strongly grooved. The labial armature and radula are much as described and figured by Bergh. The formula of the latter is about 50 x 70.0.70. The teeth are bifid; the innermost bear an accessory denticle on the inner side and hence appear trifid. The others bear two or three very fine denticulations below the two prongs. The outermost have 5-7 rather larger denticles. A second specimen subsequently examined has also only a few conical protuberances behind and none in front, so that this peculiarity is perhaps characteristic of East African specimens. 10. CHROMODORIS XIGROSTRIATA. (Plate XXIV. figs. 5 &, 6.) Chromodoris nigrostriata Eliot, Abstr. P. Z. S. 1904, No. 4, p. 15, March 8. One specimen from the mouth of Chuaka Bay, found among the branches of growing coral at extreme low tide. The living animal was 15 mm. long and 3 broad when fully extended. The foot was broad and high; the mantle-edge was narrow, and in the alcoholic specimen has become a mere low ridge. The ground-colour was a violet-blue grey, with rather ill-defined blotches of light primrose-yellow on the back, mantle-edge, and sides of the foot. On the back and sides of the foot were also very distinct curved black lines, one of which formed a horseshoe round the gill-pocket, while the rest were arranged in a nearly symmetrical figure. The edges of the rhinophore and gill-pockets were not raised. The gills were seven and completely retractile into a pocket which could close over them. The separate plumes were orange-red, but the rather large basal part, where they were all united, was of the same violet-grey as the body. The rhinophores were of a rather deep red. The alcoholic specimen is of a uniform bluish grey ; the yellow blotches have disappeared, but the black lines are very distinct and vivid. The rhinophores are large, and of the seven gills three appear to be much larger than the others, which is not apparent from the drawings or descriptions of the living animal. The tentacles are entirely withdrawn and only indicated by two puckers, one on each side of the mouth. The front of the foot is round, and no groove is visible. The anterior part of the body has been torn, with the result that the buccal parts have been injured. The labial armature is a mass of thick stout hooks, shaped much as in Bergh's figure of Chr. semperi, arranged in a regular- tessellated pattern. The radula, which seems small and brittle, is much damaged. No rhachis or rhachidian teeth are |
