562 PROF. C. H. o'dONOGHUE : REPORT ON 
mantle is well developed, fairly thin, and extends beyond the body all round, 
save that the tip o£ the tail ^^robably projects slightly during locomotion. 
Colour. In the preserved specimens the colom" is black, shading off to a 
dark grey near the mantle-margin, but showing no sign of the red margin 
described by Stimpson in the living animal. It is covered irregularly with 
tiny white spots, which grow more abundant and larger towards the margin 
of the mantle. The branchise are of the same dark colour as the body. Tlie 
under surface of the foot is also of a dark grey shade. In life the white 
spots are more striking and the sole of the foot of lighter grey. 
Dimensions. The specimens varied in size, and the largest measured 
23 mm. long by 15"5 mm. wide and 9'2 mm. high. The smallest was 
only 12'5 mm. long. 
Head. The head is very small and inconspicuous, and bears a much reduced 
tentacle at each side. The mouth is a small circular pore lying between the 
lips of a deep cleft in the anterior margin of the foot. 
Foot. The foot is moderately large ; its sides are continued out a short 
distance as shallow flanges and its posterior is bluntly pointed. The front 
end is deeply cleft, and between its margins, as noted above, the mouth is 
situated. 
HhinopJwres. The rhinophores are fairly small, completely retractile within 
sheaths with smooth circular margins, and bear a perfoliate clavus on a short 
cylindrical stalk. 
BrancJdce. The tripinnate branchial plumes are eight in number and 
arranged in the form of a circle, incomplete behind, but the gap is filled in 
by the low anal papilla. They are of the same general colour as the dorsal 
surface. 
Radula. No trace of a radula or pharyngeal complex is present. The 
oesophagus takes the form of a straight narrow tube. 
Notes. In all seven specimens were represented in the collection : three 
large specimens from Sandy Isle ; three smaller specimens from Wooded 
Isle ; one deformed and swollen specimen from Pelsart Island. 
This species of Dendrodoris seems to be widely spread in the Indian and 
Pacific Oceans, and the type-specimen was described from Loo Choo and 
Kikaisima. 
Species Dendrodoris mammosa (Abraham), Proc. Zool. Soc. 1877, p. 266, 
pi. Ixix. figs. 20-21. (PI. 28. fig. 15.) 
Synonymy : Doris mammosa Abraham. 
Doriopsis mammosa auct. 
Doridopsis mammosa auct. 
Body. The body is fairly large and of an elongated oval shape. The 
mantle is strongly developed, and projects all round as a thin fold about half 
the width of the body, and has a wavy margin. The very soft dorsum and 
in part the mantle also are covered with very large irregular warty 
