HYLI0BATID2E. 
129 
P. 1519. Portion of upper dentition; Bracklesham. Egerton Coll. 
40524. Polled fragment of upper dentition ; Bracklesham. 
Purchased, 1867. 
25616. Type specimen of A. rectus, Dixon ; Bracklesham. 
Dixon Coll 
P.5429. Similar specimen ; Bracklesham. 
Presented bg P, E. Coombe, Esq., 1888. 
40263. Small upper dental plate ; Bracklesham. Edwards Coll. 
P. 3508. Two detached upper dental plates, and two in natural 
association; Bracklesham. Enniskillen Coll. 
P. 1519 a. Fragments of upper dental plates, one perfect, and two in 
natural association; Bracklesham. Egerton Coll. 
P. 5588. Connected series of six imperfect upper teeth; Brackles¬ 
ham. . Harford Coll. 
P. 1517. Upper dental plate and fragment; Barton Cliff. 
Egerton Coll. 
P. 3055. Portion of lower dentition, showing parts of ten plates ; 
Isle of Sheppey. Enniskillen Coll. 
25618, 25626. Single dental plate, and series of four, referable to the 
lower jaw, figured by Dixon as pertaining to the present 
species, op. cit. pi. xi. figs. 3, 4; Bracklesham. 
Dixon Coll. 
25622. Series of three lower dental plates ; Bracklesham. 
Dixon Coll. 
Aetobatis marginalia, Dixon. 
I860. Aetobatis marginalis, F. Dixon, Foss. Suss. p. 201, pi. xii. fig. 1. 
Type. Portion of upper dentition ; British Museum. 
The coronal surface is much raised in the middle, thus exhibiting 
a strongly arched contour, and the tooth attains a considerable thick¬ 
ness. The crown becomes suddenly flattened a short distance from 
each extremity, producing a small marginal area marked with large 
longitudinal wrinkles. 
Form. Loc. Bracklesham Beds (Middle Eocene): Bracklesham 
Bay, Sussex. 
25624. Type specimen figured by Dixon, loc. cit. Dixon Coll. 
25825. Fragment of two connected upper dental plates, referred to 
by Dixon, loc. cit. Dixon Coll. 
P. 5428. Fragments of three teeth. 
Presented by P. E. Coombe, Esq., 1888. 
k 
