368 CRETACEOUS FISHES, 
Belonostomus, but it must have belonged to a larger fish than the jaw figured in 
the ‘ Poissons Fossiles’; the large teeth are most numerous in the anterior part 
of the jaw ; they are conical, the apices being very sharp and solid, but the cen- 
tres hollow. 
Belonostomus attenuatus, R.3. (Tab. XXXV. figs. 4 & 4*.) 
Mr. Catt has also two specimens of the jaws of a Belonostomus, smaller and of 
far more delicate proportions than the preceding species, for which I propose the 
name attenuatus ; the jaws are remarkably slender, and the teeth minute. 
Genus Prionolepis’, Egerton. 
Prionolepis angustus, R. 4. (Tab. XXXII*. fig. 3.) 
This genus is founded on a specimen from the cabinet of the Rev. Thomas 
Image, which was found at Burwell, near Newmarket : its nearest affinity is with 
the genus Aspidorhynchus, from which however it differs in the arrangement and 
articulations of the scales. The flanks of the fish were protected by a single 
series of long, narrow scales, deeply serrated on their posterior margins. In 
place of the broad elevated band, which occurs on the inrer surface of the scales 
of Aspidorhynchus, the scales of this fish are furnished with a slight rib, defining 
the extent of the overlap; the perforation for the lateral line occurs near their 
upper extremities. The specimen only shows a small portion of the fish, the 
anterior and posterior extremities being deficient. 
Family Ca@Lacantui?. 
Genus Macropoma’, Agassiz. 
Macropoma Mantel, R. (Tab. XXXIV. fig. 2. Agassiz, vol. il. p. 174.) 
This fish is from 10 to 16 inches in length ; it has two dorsal fins, the anterior 
one very large, with seven or eight strong rays; the two first have numerous 
spines ; tail very broad and long ; the teeth are small, conical and numerous, 
especiaily in the upper jaw. I have figured a fine head of this species, which 
shows the bones to be elegantly marked with a series of tuberculated lines radiating 
from the centres of ossification. I possess two specimens with coprolites in the 
‘ mpiwy serra, Neris squama. * KotAos cavus, axavOa aculeus. 
* jakpds extensus, apa operculum. 
