136 
Cycxoptychtus sp. ? 
Rare. Part of a jaw, nearly an inch long, with 14 sharp 
lanceolate teeth yL of an inch in length. 
Gyrolepis Rankinii. Agass. 
One of the few examples from this district of a fish 
being found with the fins and scales in situ. It is 5 inches 
long, and exhibits part of the head, two dorsal fins, and a 
mass of small scales. 
Pal^oniscus. 
I have found no good specimen of this usually abundant 
genus. Occasionally a few detached scales and teeth are 
met with, which exhibit its peculiarities. 
CjELAcanthus lepturus. Agass. 
The remains of this species are fairly numerous, and 
indicate a fish from 12 to 15 inches in length, and as the 
specimens figured by Professor Huxley in Decade XII. of 
the "Mem. of the Geological Survey," are only 4 to 5 
inches long, the present examples may be regarded as 
large. All my specimens are disarticulated ; as single bones 
they are very perfect, and many of the external ones 
exhibit most beautifully the sculpturing peculiar to the 
genus. I have, of the bones forming the head, the hyo- 
mandibular and palato-quadrate, which are always found 
anchylosed into one piece, irregular plates, ramus of lower 
jaw with teeth, opercula, and frontal bones. Bones forming 
the pectoral arch and large interspinous bones connecting 
the unossified vertebrae with the dorsal fin-rays. A 
number of bones presenting very much the appearance of 
vertebrae, but of a more cruciform shape, were, doubtless, 
the ossified centres from which were suspended the branchi- 
ostegal rays, some examples show the rays in situ, connected 
with their cruciform support. Fragments of the rays ex- 
