IG 
THE GEOLOGIST. 
Platysomus, 
A fish of tliis extraordinary genus^ nearly entire,, t^vo inches 
and a quarter long^ and one inch and three quarters broadj as 
well as a larger one^ were both found by myself. 
Coelacantlms. 
Two entire specimens of fishes of this genus have been found ; 
the largest is five inches^ and the smaller about two inches long. 
Gyracanthus. 
Large bony rays of a fish of this genus are found detached — 
the fragment in my possession^ three inches long and one inch 
in diameter, is probably the G. formosus of Agassiz. This fish 
belongs to the Placoidean order, and to the family of Cestra- 
ciontes, so named from their approah to the Cestracion of New 
Holland. 
BijjJodus. 
Detached teeth of the D. gibhosus are found in this locality ; 
they have three prongs of ii'regular sizes, springing from a solid 
oval base of bone, those on the outer sides being the largest, 
and the central one much smaller, all thickly coated with ena- 
mel. From the shape of the base, in which two orifices for the 
insertion of blood vessels appear, most probably they were in- 
serted into cartilage. 
Ctenoptychius. 
Detached teeth of this genus occur at Pendleton. Like those 
last described, they belonged no doubt to a cartilaginous fish. 
They consist of solid pieces of bone coated with enamel, having 
their edges toothed like a comb. 
Ctenodus {?) 
A palate with a rough triturating surface is found, but whe- 
ther it belongs to this genns it is difficult to say. Specimens of 
the five last genera are rare at Pendleton when compared with 
the number found at Ardwick and Bradford, but they are gene- 
rally met with near together; whether they all belonged to 
one fish, or to ditFerent individuals, it is difficnlt to sny ; but, on 
