MYLIOBATID^. 
119 
portion, rapidly becoming thinner on each side ; the extremities of 
this tooth are more or less backwardly reflexed, and the lateral teeth 
narrow, sixHsided, and somewhat obliqne. 
Form. 4r Loc- 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. 1493. 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. Typo specimen. Egerton Coll. 
43036. Fine 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 hy the Rev. Greville Chester, 1871. 
Myliobatis angustidens, Sismonda. 
1849. Myliobatis angustidens, E. Sismonda, Mem. R. Accad. Sci. Torino, 
[2] vol. I. p. 62, pi. ii. %3. 56, 56. 
1877. Myliobatis angustidens, A. Issel, Ann. Mus. Civ. Stor. Nat. 
Genova, vol. x. p. 328. 
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. ^ hoc. 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 (?) ttimidens, sp. nov. 
An incompletely definable species, probably of Myliobatis, is indi- 
cated by the following median teeth from the Red Crag of Suffolk. 
The coronal contour is sharply raised in the middle, as in M. ju- 
gosus, Leidy, difi’ering only from the latter tooth in the greater rela- 
tive breadth of the rounded elevation. 
