REGAN—MARINE FISHES, 251 
Spheroides, not compressed nor constricted at the base and with the nostrils placed 
anteriorly and posteriorly. No free opercular flap. No trace of the third (occipital) ray 
of the anterior dorsal, which is so constantly present in other members of the family ; 
last ray of second dorsal cleft to the base. Pectoral with very long pseudobrachium, 
as in Chirolophius, Ren. 
163. Sladenia gardineri, sp.n. (Plate 32.) 
Head 4 as long as the fish. Snout 3 times as long as the eye, the diameter of which 
is 11 in the length of head. Spines on the head and humeral spines all short, simple, 
obtuse ; supraorbital ridges not denticulated, each terminating in a spine posteriorly. 
Anterior pair of enlarged teeth of inner preemaxillary series fixed; largest of 2 or 3 on 
each side of the vomer depressible. Dorsal II, II, 9; first two rays of spinous dorsal 
slender, setiform, the second ¢ as long as the first, which is 4 the length of head ; poste- 
rior part of spinous dorsal represented by 2 nearly completely concealed rays. Anal 6. 
Pectoral 18. Dark greyish, with pale vermiculations ; outer 4 of pectoral pale. 
Chagos Archipelago, Salomon, about 450 fathoms. 
A single specimen, 500 mm. in total length. 
Malthida. 
164. Halieutea hancocki, sp.n. (Plate 31. fig. 6.) 
Dise subcircular, its length a little less than its breadth and a little more than the 
length of the tail, without the caudal fin. Disc edged with filaments; lower surface 
finely granular; upper surface with spines, most of which are 3-rooted, the enlarged 
spines not so strong as in H. stellata. Diameter of eye 4 the length of the disc and a 
little more than the width of the concave interorbital region. Rostral tentacle 3-lobed, 
the median lobe the smallest. Width of mouth (measured from the extremity of one 
maxillary to that of the other)? the width of the disc. Dorsal with 5 rays, anal with 4, 
pectoral with 13 or 14. Caudal } the length of the fish (without the caudal), a little 
longer than the pectoral, which is 14 as long as the ventral. Greyish, with traces of 
darker reticulations on the upper surface ; fins pale. 
Saya de Malha Bank, over 123 fathoms. 
A single specimen, 130 mm. in total length. 
This species is allied to H. stellata, Wahl., and to H. nigra, Ale. 
Named after Lieut. Hancock, R.N., First Lieutenant of H.M.S. Sealark. 
Balistide. 
165. Balistes niger, Mungo Park. 
Maldives, Haddumati, 40 fathoms. 
166. Balistes aculeatus, UL. 
Maldives ; Chagos Archipelago, Peros and Salomon. 
