248 PERCY SLADEN TRUST EXPEDITION. 
150. Callionymus affinis, sp. n. 
Length of head (to gill-opening) 3% in the length of the fish. Diameter of eye 24 in 
the length of head; eyes contiguous ; gill-openings small, superior; preeopereular spine 
straight, with serrated inner edge and an outer antrorse process at the base; maxillary 
extending nearly to the vertical from anterior margin of eye; occipital region rugose, 
not covered by skin. Lateral line single. Dorsal IV, 9; the anterior fin, in the male, 
elevated, but with the rays scarcely produced ; rays of the second dorsal equal, the last 
reaching the caudal when laid back. Anal 8, the rays increasing in length posteriorly. 
Pectorals and ventrals extending beyond origin of anal. Caudal, in the male, elongate, 
{ as long as the fish. Body with dark spots or bars. Males with a heart-shaped 
blackish blotch on the throat and with stripes on the gill-membranes. Spinous dorsal 
dark, with undulating oblique white lines and with two small black spots at the upper 
margin behind the second and third rays respectively; second dorsal with 3 series 
of oblong spots; caudal crossed by dark bars or series of spots; outer half of anal 
blackish. 
Maldives, 8. Nilandu, 30 fathoms. 
A single specimen, 85 mm. in total length. 
Closely allied to C. persicus, Regan, which has a shorter head (44 in the length of the 
fish in specimens of this size), the spinous dorsal rather more elevated and with the rays 
more produced and the caudal fin longer (as long as the fish in specimens of 90 mm.). 
The two species are very similar in coloration, but in C. persicus there is only one black 
spot at the edge of the anterior dorsal fin, behind the second ray. 
151. Callionymus gardineri, sp.u. (Plate 30. fig. 5.) 
Closely allied to C. maldivensis. Length of head (to gill-opening) 33 in the length of 
the fish. Diameter of eye 33 in the length of head; maxillary not extending to below 
the eye. Dorsal IV, 9; first ray of anterior dorsal, in the male, produced into a 
filament; second and third rays equal in length, § the length of head. Anal 8. Caudal, 
in the male, elongate, slightly more than 3 the length of the fish. Head and body 
marbled or variegated; a small dusky area on the throat; spinous dorsal with un- 
dulating oblique stripes with dark edges, which break up posteriorly into series of spots 
enclosed in dark rings; a blackish spot just behind the tip of the third ray; second 
dorsal and caudal with white (in spirit) spots and vermiculations ; caudal also with 
some dark spots; anal with a dark edge. 
Cargados Carajos, 20 to 30 fathoms. 
A single specimen (¢ ), 220 mm. in total length. 
152. Callionymus kaianus, Gthyr. 
This species, hitherto known only from the type, a male specimen dredged by the 
‘Challenger’ at a depth of 129 fathoms near the Ki Islands, between Australia and 
New Guinea, is represented in the Gardiner collection by a female, dredged at a depth 
of over 128 fathoms on the Saya de Malha Bank. ‘The first dorsal ray is not produced, 
but in other respects this example closely resembles the type. 
