SCOrELIDuE. 
259 
two thirds as long as the posterior tooth, and the length of the 
latter less than the interspace between the two teeth, also less than 
half the length of the part of the premaxilla in front of its insertion. 
Mandible much attenuated in front, with two relatively large teeth 
the middle of the dental series ; the small recurved teeth in 
advance of these gradually increasing in size backwards. 
Form. ( j- Loc. Albian (Gault) : Folkestone, Kent. 
37930. Type specimen, being a fragment apparently of the hindei 
part of the premaxilla. Purchased, 1863. 
47204. Imperfect left premaxilla associated with the greater part 
of the mandible and remains of three vertebra, shown of 
the natural size in FI. XIII. fig. 3. The premaxil a 
(pm,r.) is imperfect at each end, and fracture near i 
middle where it seems to be accidentally bent. Immedi- 
ately in front of this fracture, the largest tooth is shown, 
with its distal portion obscured by the remains o e 
mandible. A slightly smaller tooth is imperfectly pre- 
served a little further back ; and then follow three or our 
still smaller spaced teeth, which are much laterally-com- 
pressed and vertically striated at the base. The dcntai> 
(cl.) is considerably fractured and broken awav be un , 
but its outer face is shown to have been smooth and rather 
tumid, impressed only by a deep longitudinal groove just 
below its upper border. Its anterior recurved teeth are 
preserved on both sides of the jaw, gradually increasing 
in size and becoming more widely spaced backwards ; the 
very large middle teeth are wanting in the fossil ; the 
hinder teeth are proved to have been very small. 
Gardner Coll. 
4 1 204 a. Uight and left premaxill® probably of one and the same 
individual, that of the right side shown of the natural size 
from the inner aspect in PI. XIII. fig- 4. Gn y t t 
anterior half of the bone is preserved, and it seems to 
represent a larger fish than the last specimen. It tapers 
to a point in front, while its inner face is smooth and 
flattened for articulation with the elongated ethmoidal 
region. Its oral face gradually widens backwards and 
forms a gently hollowed trough, which is filled at tv\o 
points by the tumid bases of the large teeth. Both these 
teeth are well-preserved, exhibiting a laterally compressed, 
straight, lanceolate crown, finely striated at its base. The 
s 2 
