MYLIOBATIDJE. 
115 
P. 5386. Twelve examples, of various sizes, some with two rows of 
lateral teeth. Presented by P. E. Coombe, Esq., 1888. 
Myliobatis goniopleurus, Agassiz. 
1843. Myliobatis goniopleurus, L. Agassiz, Poiss. Foss. vol. iii. p. 319, 
pi. xlvii. figs. 9, 10. 
1888. Myliobatis goniopleurus, A. S. Woodward, Ann. Mag. Nat. Hist. 
[6] vol. i. p. 44. 
Type. Abraded lower dentition ; British Museum. 
Teeth of similar proportions to those of M. striatus; lower den¬ 
tition differing in the greater thickness and more raised contour of 
the crown (see PI. III. fig. 5 a). 
The second of the specimens mentioned below seems to afford the 
requisite proof of the distinctness of this species from M. striatus, 
noted as* wanting at the time of publication of the present writer’s 
memoir, loc. cit. All these specimens represent the lower dentition, 
that of the upper jaw being at present indistinguishable from the 
corresponding dentition of M. striatus. 
Form. <j* Loc. London Clay (Lower Eocene): Isle of Sheppey. 
Bracklesham Beds (Middle Eocene): Bracklesham Bay. 
P. 3045. Type specimen ; Sheppey. Enniskillen Coll. 
P. 5387. Connected series of eleven median teeth, with portions 
of two rows of lateral teeth on one side, and three on fi******U 
the other, mostly abraded, hut in part showing the 
original coronal surface; Bracklesham. A portion of the 
specimen is represented, of the natural size, in PI. III. 
fig. 5, arid the coronal contour is given in the section, 
fig. 5 a. The median teeth measure 0*05 by 0*007- 
0*009, and are slightly curved antero-posteriorly. 
Presented by P. E. Coombe , Esq., 1888. 
P. 5385. Three imperfect abraded series of median teeth, with a few 
first lateral; Bracklesham. The median teeth measure 
respectively, 0*021 by 0*005, 0*032 by 0*007, and 0*038 
by 0*008. Presented by P. E. Coombe, Esq., 1888. 
38837. Series of five median teeth, with portions of two lateral rows ; 
Bracklesham. Bowerbank Coll. 
43102. Abraded series of seven median teeth, with portions of two 
lateral series on each side; Bracklesham. The median 
teeth measure 0*031 by 0*007. Wetherell Coll. 
25663. A very similar, but slightly larger specimen ; Bracklesham. 
Dixon Coll. 
