16 
ACTINOPTERYGII. 
P. 935 a. Much crushed and fractured small head, lateral aspect. 
Egerton Coll. 
P. 4271. Similar specimen. Enniskillen Coll. 
47462. Imperfect remains of head, displaying the parasphenoid 
bone in side view, and one of the suborbital plates. In 
its posterior portion the parasphenoid exhibits a large 
ascending lateral plate. Purchased , 1876. 
48007. Imperfect cranium in side view, showing the orbit, narial 
opening, and the dentition with the notches for the 
reception of the lower laniaries. Purchased, 1887. 
40499. Small cranium, upper aspect. Purchased , 1867. 
P. 964. Portion of similar cranial roof, labelled Belonostomus 
tenellus by Agassiz. Egerton Coll. 
P. 965 b. Mandible, lateral aspect, showing part of the dentition 
and the superficial rugose ornament, and the continuity 
of the articular with the angular bone. Egerton Coll. 
P. 965 C. Imperfect small mandible, oral aspect, exhibiting a sharp 
median longitudinal ridge on the long symphysis. 
Egerton Coll. 
P. 513. Symphysial portion of mandible, labelled Belonostomus 
tenellus by Agassiz, and intended to be the type specimen 
of that undefined species. On account of the form of the 
fractured extremity, this fossil was described and figured 
as a presymphysial bone by the present writer in the 
Quart. Journ. Geol. Soc. vol, xliv. p. 147, pi. vii. fig. 14 ; 
but such a determination is very doubtful and not con¬ 
firmed by any other specimen. Egerton Coll. 
P. 3790. Head and remains of trunk, without fins, noticed by the 
present wwiter in Ann. Mag. Nat. Hist. [6] vol. i. p. 355, 
and three of the dorsal scutes figured in Mem. Geol. Surv. 
N. S. Wales, Pakeont. no. 4, pi. viii. fig. 7. The head 
exhibits the typical characters of the species, and the 
mandible is scarcely shorter than the upper jaw. Portions 
of the operculum and clavicle are preserved, and remains 
of the axial skeleton of the trunk occur beyond. The 
neural arches are verv broad and bear short slender neural 
spines, which may have become elongated in the caudal 
region to be symmetrical with the haemals, of which a few 
