390 SIR f. ELIOT OX NUDIBRANCHS [Mar. 1, 



ai'matxire is foi-meil of two large .sti-ong triangular plates, almost 

 united into a ring, dark brown, and formed of a mass of long 

 hooks. The rhachis of the radula (PI. XXIV. fig, 1) bears lozenge- 

 shaped thickenings, on each side of which are about 45 teeth. 

 The number of transverse rows is about 70. The innermost teeth 

 have a large denticle on the inner side, and three small ones on 

 the outer ; the rest are simply hamate, wath 8-10 minute denticles ; 

 the outermost irregular and denticulate on the apex in the younger 

 rows, but in the older the denticulations seem to have been 

 woi-n ofl'. 



5. ClIllOMODORI S SPLENDENS. 



Chroviodorls splendeas Eliot, Abstr. P. Z. S. 1904, No. 4, 

 p. 15, March 8. 



\_i =Chr. splendida Angas, Journal de Conch, i. 1864, p. 55.] 

 Two specimens from Chuaka, East Coast of Zanzibar. The 

 notes on the living animal are as follows : — " General colour 

 somewhat miscellaneous, being produced by thick collections of 

 purple and white dots, in different propoitions in different places, 

 A vivid orange border round the whole body. Underside inilk- 

 Avhite. Mantle ample. Gill-pocket fairly large, gills purplish." 



The alcoholic specimens are of a uniform dirty yellow, and of 

 about the same size. Length 40 mm., breadth 13, height 10. 

 The free portion of the tail is 6 mm. long, but is entii'ely covered 

 by the mantle, the free margin of which measui'es 7 mm. behind 

 and 5 mm. at the sides and head. The rhinophores ai-e lai-ge. 

 The edge of the branchial opening is slightly raised. The total 

 number of branchial phmies is 27, but of these three seem to be 

 accessoiy ramifications and not independent branchite. The circuit 

 is open behind, and the two ends are turned inwards in a spiral. 

 The anterior plumes are large, and those in the spiral very small, 

 so that the living animal shows ten or twelve biunchia?. The foot 

 is rather wide, with thin margins, and is dilated and deeply 

 grooved in front. The tentacles are distinct. The inconspicuous 

 labial armature consists of two small yellowish plates, composed 

 of faii'ly long bent rods, most but not all of which are bifid. The 

 radula is also yellowish, with about 70 x 60.0.60 foi' formula. On 

 the rhachis are indications of triangular thickenings, but the base 

 of the triangle is not distinct. The innermost teeth bear three or 

 four denticles on tlie inner and five on the outei- side. The rest 

 are hamate, I'ather erect, with six denticles under the hook de- 

 creasing in size downwards. The outeiinost show less difference 

 fr'om the rest than usual, and are long, ei'ect, with about four 

 denticles on or near the apex. 



I think it very probable that this is the animal described as 

 Goniodoris splendida in the ' Journal de Conchyliologie,' and I 

 have indicated this probable identity in the name. The scheme 

 of coloration is very similar, and the ample mantle, large rhino- 

 phores, and numei'ous branchise ai^e also points of resemblance, 

 but the purple in the present specimen is distiibuted in the form 

 [12] 



