MYLIOBATIDiE. 
119 
portion, rapidly becoming thinner on each, side ; the extremities of 
this tooth are more or less backwardly reflexed, and the lateral teeth 
narrow* six-sided, and somewhat oblique. 
Form. Sf Loo. Miocene : Maltese Islands. 
Upper Dentition. 
41768. Connected series of seven broken median teeth, measuring 
0*039 m. by 0*0055 m. The extremities of the teeth are 
not so much reflexed as those of the lower jaw. 
Purchased , 1869. 
P. 1492. Large, much broken specimen, showing portions of ten 
median teeth and two lateral series, and exhibiting the 
same characters as the preceding. The median teeth 
measure 0*057 by 0*0075. Egerton Coll. 
Lower Dentition. 
P. 460. Type specimen. Egerton Coll. 
43036. Pine example, smaller than the type, showing two lateral 
rows; Isle of Gozo. The median teeth are reflexed at the 
extremities, and measure 0*032 by 0*004—0*0055. 
Presented by the Pev. Greville Chester , 1871. 
Myliobatis angustidens, Sismonda. 
1849. Myliobatis angustidens, E. Sismonda, Mem. It. Accad. Sci. Torino, 
[2] vol. x. p. 52, pi. ii. figs. 55, 56. 
1877. Myliobatis angustidens, A. Issel, Ann. Mus. Civ. Stor. Nat. 
Genova, vol. x. p. 328. 
A 
Type. Lower dentition; School of Engineering, Turin. 
Crown of lower dentition flat; median teeth in adult about ten 
times as broad as long; lateral teeth longer than broad, somewhat 
oblique. 
Form. Sf Loc. Pliocene : Tuscany. 
47030. Six fragments of lateral and median teeth, determined by 
Lawley to belong to this species ; Lower Pliocene, Orciano, 
Tuscany. Purchased , 1875. 
Myliobatis (?) tumidens, sp. nov. 
An incompletely definable species, probably of Myliobatis, is indi¬ 
cated by the following median teeth from the Led Crag of Suffolk. 
The coronal contour is sharply raised in the middle, as in M. ju- 
gosus , Leidy, differing only from the latter tooth in the greater rela¬ 
tive breadth of the rounded elevation. 
