SEMI0N0TID2E. 
117 
one right mandibular ramus, and a fragment; Hastings. 
The arrangement of the teeth of the vomer and one 
splenial is shown in fig. 24. BecTcles Coll, 
P. 1126. Fragments of dentition; Sussex (?). Egerton Coll. 
2327, 2841, 2844, 28412 a. Fragments of dentition ; Sussex. 
Mantell Coll. 
P. 4917. Right pterygo-palatine and two fragments; Hastings. 
Dawson Coll. 
P. 4995. Right dentary showing three marginal teeth ; Hastings. 
Presented by J. E. Lee, Esq., 1885. 
2524. Right clavicle, inner aspect; Tilgate Forest. Mantell Coll. 
P. 6362. Fragmentary trunk, with hinder extremity of head; 
Hastings. BecTcles Coll. 
23624. Crushed remains of head and anterior portion of trunk; 
Perch Hill, Brightling, Sussex. The imperfect meta¬ 
pterygoid and quadrate are shown in position on the left 
side, and the greater part of the hyomandibular is pre¬ 
served on the right. The left epihyal, ceratohyal, and 
hypohyal are displaced and well shown in series ; and the 
uppermost, broad branchiostegal ray occurs immediately 
behind. The clavicles and some of the postclavicular 
scales are exposed; and at the base of the pectoral fin on 
the right side there are five elongated basal bones. 
Presented by Bev. Joseph Gould, 1849. 
P. 6347. Anterior portion of trunk; Hastings. BecTcles Coll. 
2676. Hinder portion of trunk, apparently noticed by Agassiz, tom. 
cit. p. 263 ; Tilgate Forest. Mantell Coll. 
P. 6348 C. Fragment of trunk showing well-ossified ring-vertebrae, 
with neural and haemal arches of the abdominal region; 
Hastings. The neural spine is not fused with the pedicles 
of the arch, and each ring as preserved seems to consist of 
four pieces. BecTcles Coll . 
P. 469. Portion of squamation figured by Agassiz, tom. cit. pi. xxx. c. 
fig. 4; Tilgate Forest. Egerton Coll. 
36592. Portion of squamation; Sussex. Dixon Coll . 
40319. Portion of squamation, finely serrated; Tunbridge Wells. 
Purchased , 1867. 
