REPORT ON THE NUDIB RANCHI ATA. 
101 
22. Platycloris murrea (Abraham). 
Indian Ocean (Mauritius). 
23. Platydoris (?) sordida (Quoy et Gaimard). 
Indian Ocean (lie de France). 
Platydoris eurychlamys, Bergh (PL II. figs. 1S-24; PI. III. figs. 1-12). 
Platydoris eurychlamys, Bergh, Malacolog. Untersucli. (in Semper, Reisen im Arehip. d. 
Philipp. Th. II. Ed. ii.), Heft xii., 1877, pp. 510-513; Taf. lix. figs. 11-18; Taf. lx. figs. 1, 2. 
Supplementheft i., 1880, pp. 61, 62 ; Taf. E. figs. 10, 11. 
Habitat. — Philippine Sea (Samboangan). 
A single specimen was taken on February 1, 1875, from a depth of 10 fathoms, at 
Samboangan, together with Ceratosoma cornigerum and Discodoris morphcea, and well pre- 
served in alcohol. 
The specimen, which was somewhat strongly hardened and rather bent, measured 
8 cm. long by 4‘8 in breadth and 1'6 cm. in height ; the breadth of the mantle edge in 
front was 1 cm., at the sides and behind 2 cm.; the breadth of the foot about P5 cm., 
the length of the tail 6 mm.; the height of the rhinopliorial bosses 2 '5 mm., the 
apertures measuring about 2 mm.; the breadth of the branchial slit about 12 mm.; the 
height of the rhinophoria 6 ‘5 mm., of the branchia 10 mm., and of the anal papilla about 
5 mm.; the length of the tentacles 3 mm. — The colour of the whole upper surface 
brownish-grey ; the sides of the body were about the same colour, as were also the margins 
of the foot, but still somewhat lighter ; the under side of the mantle edge was a clear 
yellowish-wdiite, so also the head and tentacles ; the rhinophoria were greenish-grey, the 
leaves of the gill blackish-grey, but the rhachidian parts yellowish-white ; the sole of the 
foot was yellowish-white. 
The form of the body was much as usual. The broad mantle edge was undulated at 
its margin ; the dorsal surface hard, somewhat rough to the touch, because it is covered 
all over with extremely fine knots. The rhinophorial bosses were about 5 '5 mm. in 
diameter, with a crenate opening ; the stem of the retracted rhinophore was about one- 
third of its whole extent ; the club was provided with at least fifty broad lamellse on 
each side. The wide branchial cleft was five-lobed, two in front, the largest behind, and 
one on either side ; the height of the largest lobe was 6 mm. The branchia was made up 
of six tripinnate leaves ; in front of the hindermost ones, and between them, was the 
cylindrical truncated anal papilla ; close to the base of which, and slightly to the right, 
was the round orifice of the renal organ. The genital opening was strongly retracted. 
The anterior margin of the foot had a shallow furrow, the posterior end was rounded. — 
The peritoneum was quite colourless. 
The strongly flattened central nervous system was enclosed in a narrow tough cap- 
