Dr. A. Giinther on Australian Reptiles and Fishes. 67 
having the anterior half of the second dorsal fin replaced by a 
pad of fat, from which the rays gradually emerge behind; the 
anterior portion does not contain any rays. It is therefore im- 
possible to give an exact number of dorsal rays. The anal fin 
is composed of about eighty-five rays. The nasal barbel extends 
to the origin of the dorsal fin; none of the others reach beyond 
the extremity of the pectoral. The eye is one-seventh of the 
length of the head. Entirely black. 
Cape York, Nicol Bay. 6 inches long. 
Neosilurus Hyrthi (Steimdachner), from Rockhampton, is evi- 
dently closely allied to this species. 
73. Ezocetus atrodorsalis, sp. n. 
D.8-9. A.10. L. lat. 35. 
Closely allied to #. hillianus. The pectoral extends to the 
end of the dorsal. The ventral fin is scarcely nearer to the 
root of the caudal than to the end of the snout, extending to 
the origin of the anal. Dorsal fin elevated, its longest anterior 
rays being as long as the head; it commences in front of the 
anal. Upper pectoral rays blackish, lower whitish ; dorsal fin 
entirely black. 
Cape York. 5 inches long. 
74. Hemiscyllium trispeculare (Rich.). 
Turtle Island, Cape York. 
75. Crossorhinus tentaculatus (Ptrs.). 
Adelaide, Cape York. 
76. Trienodon obesus (M. & H..). 
Red Sea, Aneiteum. 
77. Trygonorhina fasciata (M. & H.). 
? New South Wales (Krefft). 
ADDENDUM. 
Holacanthus Duboulayz, sp. un. 
pe ot 
Allied to H. mesoleucus. Scales small. . Preopercular spine 
with a scarcely perceptible groove, reaching to the vertical from 
the hind margin of the operculum. Dorsal and anal fins rounded 
posteriorly. Head with the anterior part of the trunk yellowish, 
which colour is sharply defined from the remaining brown por- 
tion. A very broad brown ocular band, broader than the eye, 
5x 
