238 PERCY SLADEN TRUST EXPEDITION, 
123. Platycephalus cooperi, sp.n. (Plate 29. fig. 5.) 
Depth of body about 6 in the length, length of head about 2§. Snout longer than 
eye, the diameter of which is 3} to 44 in the length of head and about 4 times the 
interorbital width. Maxillary extending to below anterior } of eye. A more or less 
developed spine in the middle of each bone of the upper surface of the cranium and also 
on the preeorbital and first suborbital ; supraorbital ridges serrated; second suborbital 
with a serrated ridge; three preeopercular spines, the upper 4 to 7 the diameter of eye. 
58 to 65 scales in a longitudinal series ; anterior 5 to 8 scales of the lateral line spiniferous. 
Dorsal IX, 11-12. Anal 11. Caudal subtruncate. Ventrals extending to third or 
fourth ray of anal. Spinous dorsal blackish superiorly ; pectorals and ventrals obscurely 
spotted. 
Seychelles Group, Amirante, 30 fathoms ; Cargados Carajos, 20-30 fathoms. 
Seven specimens, the largest 200 mm. in total length. 
Named after Mr. C. Forster Cooper, M.A., who accompanied Mr. Gardiner on his 
expeditions. 
124. Platycephalus pristiger, C. & V. 
Seychelles Group, Amirante, 30 fathoms. 
125. Plutycephalus oligolepis, sp.n. (Plate 29. fig. 4.) 
Depth of body 53 in the length, length of head 23. Breadth of head 15 in its length. 
Snout as long as eye, the diameter of which is 33 in the length of head and 4 times 
the interorbital width. Maxillary extending to below anterior 3 of eye; vomerine teeth 
in 2 separate patches. Tfead with numerous, compressed, curved spines ; two pairs on 
the snout, 3 in front of each orbit, 10 or 11 on each supraorbital ridge, which is followed 
on each side by a group of 4; a spine on each parietal, 2 or 3 behind the middle of each 
orbit, 2 on each supratemporal, a series of 8 on each post-temporal. Suborbital ridge 
spinate throughout, ending in a preeopercular spine of moderate length, below which 
are 2 others. ‘I'wo opercular spines and one on the clavicle. 5 gill-rakers on the lower 
part of the anterior arch. 31 scales in a longitudinal series ; only the anterior 3 or 4 
scales of the lateral line spiny. Dorsal IX,110. Anal 11. Ventrals extending to the 
fourth or fifth ray of anal. Caudal subtruncate. A dusky spot on each ventral fin. 
Cargados Carajos, 20 to 30 fathoms. 
A single specimen, 100 mm. in total length. 
126. Platycephalus pedimacula, sp. n. 
Closely allied to the preceding, differing as follows:—Four spines in front of each 
orbit ; supraorbital ridge entire anteriorly, serrated posteriorly, followed by a series of 
3 spines ; 2 spines on each parietal, a series of 4 or 5 behind the middle of each orbit. 
Suborbital ridge less strongly serrated than in P. oligolepis (a series of about 26 serree 
in this species instead of 17 as in the preceding one). 
Maldives, Kolumadulu, 35 fathoms. 
A single specimen, 62 mm. in total length. 
