SIR C. ELIOT—REPORT ON THE NUDIBRANCHS. 107 
yellowish white. The blue markings show no tendency to arrange them- 
selves in lines, but in one specimen the yellowish spots are confluent and 
form a medio-dorsal stripe from the rhinophores to the branchie. 
I have endeavoured to show (/. ¢.) that Bergh’s Chr. sempert ought to 
bear the earlier name given by Kelaart, and also that Chr. nigrostriata, 
Eliot, and Chr. tenwilinearis, Farran, are merely varieties of the same 
species. If Chr. diardu is recognized as the specific name, then var. semperi 
will be the variety in which the coloration is composed wholly or mainly of 
spots, blue and yellow; var. tenwilinear?s will be the pale variety with 
greenish lines ; var. nigrostriata the violet-coloured variety with yellow spots 
and lines of black or deep blue, while the yellow variety with black stripes 
will be var. fava. (See Hliot, in Proc. Zool. Soc. 1904, p. 395, and Journ. 
of Conchology, 1905, p. 246.) 
In a letter just received, Mr. Crossland reports that “a blue Chromodoris 
of a species common in Zanzibar,” by which he probably means the present 
animal, is distasteful to fish. He says: “I threw in the Chromodoris to see 
whether its colour would be any protection to it. About half a dozen fish 
dashed up at once, but only touched it with their mouths and turned away 
directly. Their getting so close to it leaves me in doubt whether they were 
repelled by its smeil or colour. I think smell is negatived because (1) none 
is perceptible to human senses as in Ceratosoma, &c.; (2) the same fish 
devour, e.g., the guts of Balistes which had been in formalin over night, 
and even the flesh of specimens of Margaritéfera vulgaris which had been in 
formalin for three weeks.” 
CHROMODORIS QUADRICOLOR (Riippell § Leuckart). 
(See Bergh: Mal. Unters. in Semper’s Reisen, vr. ii. 1905, p. 68, and ‘Siboga ’-Expeditie, 
1905, p. 145. Bergh originally described the species as Chr. Elizabethina, but 
subsequently identified it with Riippell & Leuckart’s Doris quadricolor.) 
Three specimens from Mersa ar-rakiya, where they were found on a 
piece of leafy sponge in half a fathom of water, and one from Engineer 
Island. The notes on the first three specimens are as follows :—“In all 
three specimens there is much more black than white, and the white stripes 
on the dorsum and the sides are of a bluish tint. The stripe round the edge 
inside the yellow is pure white. In two specimens the yellow is rich and 
nearly pure, but in the third the border of the mantle is dirty white with a 
yellowish tinge and the white stripes on the back are broader *. The white 
stripes bifureate behind the rhinophores and they join behind the gills. 
There are two white stripes on the sides of the body, as well as those under 
the edge of the mantle and at the edge of the foot. All the specimens are 
* As preserved, the back might almost be described as a white background bearing black 
bands. 
LINN. JOURN.—ZOOLOGY, VOL, XXXI. 9 
