112 
SELACHII. 
P. 1508 b. Fragment of very large dentition. Egerton Coll. 
P. 4457 C. Fragment of young dentition, described and figured loo. 
cit. p. 42, pi. i. fig. 1. Enniskillen Coll. 
P. 3051. Type specimen of M. heteropleurus , Agassiz, loc. cit. 
p. 323, pi. xlvii. figs. 6-8 ; locality unknown. 
Enniskillen Coll. 
Myliobatis striatus, Buckland. 
1837. Myliobatis striatus , W. Buckland, Geol. & Min. 2nd edit. vol. ii. 
p. 46, pi. xxvii. d, fig. 14 (name and figure only). 
1843. Myliobatis striatus, L. Agassiz, Poiss. Foss. vol. iii. p. 320. 
1843. Myliobatis punctatus, L. Agassiz, tom, cit. p. 322, pi. xlvii. figs. 
11 , 12 . 
1850. Myliobatis irregularis, F. Dixon, Foss. Suss. p. 199, pi. xi. 
fig. 15. 
1850. Myliobatis edwardsii, F. Dixon, op. cit. p. 199, pi. xi. fig. 16. 
(?) 1885. Mxyliobatis toliapicus, F. Noetling (gion Agassiz), Abb. geol. 
Specialk. Preussen u. Tliiiring. Staaten, vol. vi. pt. 3, p. 19, pi. ii. 
fig. 1. 
1888. Myliobatis striatus, A. S. Woodward, Ann. & Mag. Nat. Hist. [6] 
vol. i. p. 42, pi. i. figs. 5-9. 
Type. Lower dentition ; Oxford Museum. 
Dentition large and thick, the coronal contour slightly arched 
from side to side, almost flat in the adult lower jaw. Longitudinal 
superficial stride or wrinkles generally well marked in unabraded 
specimens. Median teeth in the adult at least six times as broad as 
long ; lateral teeth longer than broad, but those of the first row not 
so elongate as in M. dixoni. 
Form. Sj' Loc. Barton Clay (Upper Eocene) : Hampshire. Brack¬ 
lesham Beds (Middle Eocene) : Sussex. , i. - 
Upper Dentition. —Some of these specimens must pertain to M. 
gonipleurus, others perhaps to M. toliapicus. Unless otherwise 
stated, they were all obtained from the Bracklesham Beds, 
Bracklesham Bay. 
25671. Fragment of dentition of very young individual, remarkably 
thick, and showing three lateral rows of teeth ; figured by 
the present writer, loc. cit. p. 44, pi. i. fig. 10. 
Dixon Coll. 
25647, 25653, 25659. Three connected series of median teeth, very 
young; the third is noticed loc. cit. p. 44. Dixon Coll. 
