(Jg ICHTHYOLOGY 
My largest specimen, a female, is seven inches long, and the 
largest male only a little over five. I have also a very young 
specimen, which is similar, but has faint traces of narrow, 
obscure, transverse bands on the body ; of the last I also find 
very faint traces on one of the large specimens ; this sort seems 
very distinct from all those mentioned by Dr. Gunther, and also 
from Axillaris of Richardson in Stokes's " Discoveries in 
Australia," vol. L, p. 486, pi. 1, fig. 1. The species of Cristiceps 
appear to be very numerous in the southern waters of 
Australia. 
HETEROCLINUS. 
Body sub-elongate ; mouth opening upwards ; snout without 
tentacles ; ventral fins inserted in front of the pectorals, 
formed of one short and two long filaments ; dorsals two ; the 
first short, the second formed of numerous spines, and only 
three posterior rays ; it is attached to the base of the caudal, and 
of two spines and numerous rays ; it is attached to the tail. 
Lateral line only marked on the extreme anterior part of the 
body ; gill membranes inflated. 
Teeth short, blunt, thick, crowded on both jaws, with an 
external line of more slender and sharper ones ; teeth are also 
very numerous on all the palatine bones ; those in front being 
on a band. 
HETEROCLINUS ADELAIDE. 
Very much like Ophiclinus Antartica, but much shorter. 
The height of the body is contained a little less than five times 
in the total length of the fish. The head is contained four 
and two-third times in the same; the eye is twice in the head; 
the mouth opens upperly, and the head appears truncated in 
front when the mouth is shut ; the eye is very large, and 
attains the profile of the head ; the upper lip embraces the 
lower jaw when the mouth is shut. 
Two dorsals ; the first short, placed behind the head, of three 
spines ; the first much stronger than the others, and rather pro- 
longated ; the second dorsal with 28 spines and three rays 
placed posteriorly, and attached by a membrane to the extreme 
