REGAN—MARINE FISHES. 229 
Maxillary scarcely reaching the vertical from anterior edge of eye. Head entirely scaly. 
18 gill-rakers on the lower part of anterior arch. 27 scales in a longitudinal series. 
Dorsal XII 15 ; spines gradually decreasing from the second, which is 3 the length of 
head and as long as the longest soft rays. Anal II 14, rounded. Caudal slightly 
emarginate, with rounded lobes. Pectoral a little shorter than the head; ventrals 
reaching the origin of anal. Caudal peduncle as long as deep. Brownish grey ; each 
scale with a blue spot; lips blackish; a blackish spot at the base of pectoral; spinous 
dorsal, ventrals, and anal blackish. 
Maldives. 
A single specimen, 65 mm. in total length. 
Closely allied to D. marginatus, Riipp., which has a deeper body (depth 13 in the 
length), a smaller eye (diameter 3 the length of head in specimens of 55 mm.), and the 
soft vertical fins more produced (longest rays of soft dorsal longer than the second spine, 
upper caudal lobe pointed). D. marginatus also differs somewhat in coloration, as the 
lips are not blackish, the pectoral spot is larger, and only the upper half of the spinous 
dorsal and the anterior half of the anal are blackish. 
64. Dascyllus melanurus, Blk. 
Maldives, Felidu, 34 fathoms. 
65. Dascyllus trimaculatus, Ripp. 
Cargados Carajos, 20 to 30 fathoms. 
66. Dascyllus aruanus, L. 
Maldives ; Chagos Archipelago, Egmont and Salomon. 
67. Pomacentrus polylepis, sp.n. (Plate 24. fig. 3.) 
Depth of body 22 to 24 in the length, length of head 32 to 33. Snout shorter than 
eye, the diameter of which is 3 to 3+ in the length of head and equal to the interorbital 
width. Maxillary extending to the vertical from anterior edge of eye or a little beyond. 
Snout, anterior part of interorbital region, przeorbital, and suborbitals naked. Przeoper- 
culum serrated; preeorbital and suborbitals entire. 47 to 50 scales in a longitudinal 
series. Dorsal XIII 11-12; fifth, sixth, and seventh spines the highest, $ the length 
of head, a little longer than the longest soft rays. Anal II 12-18. Caudal deeply 
forked. Pectoral nearly ? the length of head; ventrals not quite reaching the origin 
of anal. Caudal peduncle a little longer than deep. Greyish violet, with blue longi- 
tudinal stripes along the series of scales; a dark spot at the base of pectoral; vertical 
fins dusky. 
Cargados Carajos, 20 to 30 fathoms. 
Two specimens, 54 and 80 mm. in total length. 
Allied to P. jerdoni, Day, but differing from all known species of Pomacentrus in the 
small size of the scales. 
