284 SIR C. ELIOT ON NUDIBRANCHS [Nov. 29, 



PhYLLIDIOPSIS CARDIXALIS B. 



TBergh, Neue Beitrage zur Kenntniss der Phyllidiaden, 

 Yerhandl, dev k.-k, zool.-bot. Gesell. in Wien, 1876.] 



Foui' specimens, one from Zanzibar and three from Wasin, weie 

 obtained of this foi*m, which has hitherto been r-ecorded from 

 Tonga. One specimen (from Zanzibar) is of considerable size, 

 being 37 mm. long, 15"5 broad, and 13 high. The others are much 

 jsmaller, being about 15 mm. long and 7 broad. The notes on the 

 living animal say that the larger specimen had the under side, 

 branchise, and sides of foot light yellow. On the back were dark 

 reddish-brown blotches beaiing black warts alternating with 

 sandy blotches beai-ing sandy wai-ts, irregularly arranged. Rhino- 

 phores dull green, anal papilla bright yellow. The smaller speci- 

 mens had a lighter coloration. The following are the notes on 

 one of them : — " Ground-colour light yellow. On the under side 

 this is only interrupted by dark green dots along the edge of the 

 foot, and blotches, which are black at their extreme edge, on the 

 mantle. They appear dorsally as black blotches. On the sides of 

 the visceral mass are large black blotches, greenish at the edges, 

 three on one side and two on the other. In the centre of the 

 back are three large reddish-brown blotches. The tubercles are 

 the colour of the blotches on which they occur. Between the red 

 and black blotches is a coarse, clear network of greenish brown. 

 The rhinophores are dark bidght green and the anal papilla bright 

 yellow." In the alcoholic specimens all trace of yellow has dis- 

 appeared, and the general coloration is a dull purplish red with 

 indications of black spots. It would appear that the alcohol 

 liberates the red pigment, which then overpowers the other 

 colour, a phenomenon which I have observed in some preserved 

 'Chromodorids. 



The general aspect of the preserved specimens resembles 

 Boridopsis, the back being covered with pyramidal compound 

 ttibercles not unlike those of D. tuberculosa, but quite different 

 from those of Ph. nohilis. In the largest specimen there are 

 three distinct lines of 8-10 tubercles in the central area, two 

 other lines less distinct, one on each side, and a number of 

 ii-regular tubercles round the mantle-edge, arranged in two or 

 three lines and decreasing in size outwards. There are also 

 ■scattered simple tubercles all over the back. The openings of the 

 rhinophores are small and inconspicuous, that of the anal papilla 

 large and circular. The branchiae ai'e dull red ; they run up 

 nearly to the mouth, and are otherwise only interrupted for about 

 2 millimetres on the right-hand side by the genital papilla. The 

 smaller, and doubtless younger, specimens are very like the large 

 ones, but the tubercles are less developed. 



The buccal parts are much as in Doridopsis. From the mouth 

 issues a thickish tube with laminated walls inside. It is bent 

 towards the left and back again, and the centi-al nervous system 

 lies at its posterior end. It is 2'5 mm. broad and about 4*5 

 long, but would be considerably longer if straightened out. From 



