394 SIR C. ELIOT ON NUDIBRAKCHS [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 pi-otuberances, four of which 

 are very distinct and the rest smaller. There are none, however, 

 on the anterior poi-tion of the mantle as in the specimens desciibed 

 by Bergh. The branchite 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 desciibed 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 pi-ongs. The ovitei'most 

 have 5-7 I'ather 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 nigrostriata. (Plate XXIV. figs. 5 & 6.) 



Chromodoris nigro striata Eliot, Abstr. P. Z. S. 1904, Xo. 4, 

 p. 15, March 8. 



One specimen fi-om 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 Avhen 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- colovir was a violet-blue grey, with lather 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 wei-e seven and completely retractile 

 jnto a pocket which could close over them. The separate plumes 

 were orange-red, but the rathei- large basal part, where they 

 were all united, was of the same violet-grey as the body. The 

 rhinophores were of a rather cleej) I'ed. 



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 ai'e 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 entii'ely 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 haA'e 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. Xo rhachis or rhachidian teeth are 



