CTEXOTH RISSID2E, 
123 
maxilla, and supramaxillaries, and the flattened ventral 
face of the abdominal region ; Lewes. 
Presented hy P. E. Ccombe, Esq., 1888. 
25840. Fractured specimen, vtdth remains of the anal and caudal 
tins ; Chalk, Sussex. Dixon Coll. 
41775. Imperfect specimen, the parts somewhat scattered; Lower 
Chalk, Burham, Kent. There are remains of the large 
dorsal and pelvic fins. Purchased, 1869:. 
47911. Smaller specimen, displaying postclavicular plates, well- 
preserved scales, and remains of the dorsal, caudal, and 
pelvic iplv.) tins, shown of the nat. size in PI. X. fig. 1 ; 
Burham. Presented by the Bon. Robert Marsham, 1877. 
P. 390-1. Two imperfect fishes, the second rather small, both 
displaying the vertebrae; probably from Lower Chalk, 
Burham. The vertebral centra are comparatively small, 
and the first specimen proves them to have been about 
40 in number. Presented by the Earl of Dude, 1881. 
25936. Much-distorted specimen ; Sussex. The imperfect cranium 
is shown in side view, and the basicranial axis is observed 
to be sharply bent upwards immediately in front of the 
otic region. Dixon Coll. 
4022-23. Fragmentary specimen in counterpart; Lewes. The 
cranial roof is imperfectly displayed. Mantell Coll. 
49873. Feebly ornamented specimen, in counterpart; Lower Chalk, 
Dorking, Surrey. Capron Coll. 
49879. Bemains of small head and trunk ; Lower Chalk, Lewes. 
There are traces of an ossified sclerotic capsule. 
Capron Coll. 
44836 a. Fragmentary remains of head and trurdc; Grey Chalk, 
Clayton Railway Tunnel, Sussex, 380 feet below the 
surface. The maxilla bears a series of very small blunt 
teeth. Presented by Benjamin Bright, Esq., 1873. 
P. 4843. Imperfect head and trunk, partly shown, nat. size, in 
PI. X. fig. 2 ; Lower Chalk, Kent. The external orna¬ 
ment is well preserved. The complete right maxilla {mx.) 
and supramaxillaries {s.mx.) are displaced forwards, 
exposing the remarkably deepened hinder half of the 
mandible, in which the suture between the angular {ag.) 
