270 DESCRIPTION OF A NEW DIPLOCREPIS FROM PORT JACKSON, 



DESCRIPTION OF A NEW DIPLOCREPIS FROM PORT 

 JACKSON. 



By J. Douglas-Ogilby, 

 Senior Assistant Zoologist, Australian Museum. 



DIPLOCREPIS costatus. sp. IIOV, 



D. S. A. 7. V. 1/4. P. 26. C. 12. 



Length of head 3j^j, of caudal fin Gjo, height of body above vent 

 8, in the total length. Greatest breadth of head f of its length; it 

 begins to narrow beyond the posterior margin of the eye, and is 

 produced into a pointed snout, which is one-fourth of the length of 

 the head. The eyes are slightly prominent, large, 5 of the length 

 of the head, and equal to the interorbital space, which is flat. The 

 nostrils are close together, near the upper front angle of the orbit, 

 the anterior provided with a tentacle. The maxilla reaches to the 

 vertical from the front margin of the eye. Lower lip with a skinny 

 flap posteriorly. The upper jaw is the longer, and is armed with 

 an outer band of strong recurved canines, the largest being at the 

 symphysis, and on the middle of the sides ; behind this row 

 is a patch of villiform teeth, broadest anteriorly. In the lower jaw 

 is an anterior band of moderately strong teeth, mingled with 

 smaller ones, and a lateral row which terminates in four very 

 strong canines. The dorsal fin commences one-fifth nearer to the 

 tip of the tail than to that of the snout, and the distance of its 

 origin from that of the caudal is exactly one-third of its distance 

 from the snout. The anal commences slightly behind the dorsal, 

 and both fins are entirely disconnected with the caudal, which is 

 rounded. Pectorals rounded, with a broad fleshy base, and con- 

 nected by a membrane with the ventrals, which consist of a spine, 



