196 
RECORDS OF THE AUSTRALIAN MUSEUM. 
On the inner side of the jaw there 
are three other rows of precisely 
similar teeth, apparently destined 
to successively replace those in use, 
but not functional until the existing 
row has been lost. When the second 
row of teeth has reached the summit 
of the alveolus, erection must be 
speedy, for the dentary is very thin, 
nowhere more than 2*5 mm. in thickness. The teeth in reserve 
have their apices pointing directly downwards, and the bases of 
the first reserve row are applied a little above the centre of the 
teeth of the functional row (fig. 2). 
As this paper was passing through the press the Trustees re- 
ceived the Report on the Deep Sea Fishes of the “ Albatross”; 
this splendid work contains a descriptive notice and figures of 
Isistius .* Garman there enumerates all the examples known, 
from which it would appear that ours ranks as the fourteenth. 
The “Albatross ” specimen was taken at Station 3413, where a 
depth of 1,360 fathoms was registered. Some idea is hov r ever 
expressed that the fish may have been netted during the ascent 
of the trawl, at a less depth. 
It is of interest to notice that Garman’s suggestion that the 
number of teeth may within certain limits increase with age, 
receives support from the characters of our specimen. Examples 
previously taken were found to have twenty-six or fewer teeth in 
the lower jaw, such were however, immature, being ten inches or 
less in length. In the individual taken by the “Albatross/ 7 which 
measures more than eighteen inches in length, there are thirty-one 
such teeth, precisely the number possessed by the Lord Howe 
Island specimen, as before stated. This, though not quite so large 
is possibly adult, as indicated by the nature of the sexual organs. 
The largest example recorded measures more than nineteen and a 
half inches in length, while Garman remarks — “ The species is 
mature at a length of eighteen inches. 77 
CoNGERMURiENA HABENATA, Richardson. 
An example obtained by Mr. T. R. Icely quite agrees with speci- 
mens from the mainland, having the tail proportionately longer 
than in Richardson’s type from New Zealand. This difference 
has been expressed by Ramsay and Ogilby in the name C. longi- 
caudata. 
* Garman — Mem. Mus. Comp. Zool., xxiv., 1899, p. 34, pis. i., ii., iii., 
lxix. 
