PART 1.] 
Theobald: Upper Tertiaries of Northern Punjab. 
43 
humerus of D. orientalis is “entepicondylar,” and consequently homologous with that of 
Cynodraco and not with that of the Lacertilia. On a future occasion I shall hope to give 
figures of these more perfect humeri, and also of other parts of the skeleton of Dicynodon 
and other vertebratse from the Panchet rocks. 
Myliobatis, Sp. 
A specimen of a portion of the dental plates of a species of Myliobatis has been sent 
down by Mr. Wynne irom the nummulitics of Kach.; this is, I believe, the first recorded 
occurrence of the genus in Indian rocks. The specimen comprises the greater portion of four 
ot the large median dental plates, and also shows on one side three small and diamond- 
shaped lateral plates; the small sizo of the innermost one of the three outer rows of 
dental plates, the two outer rows being absent, shows that the specimen belongs to the genus 
Myliobatis, and not to Zygobatis. The median teeth are rounded transversely, and some¬ 
what hollowed near the middle line and along their outer border; their anterior border is 
concave. The antero-posterior diameter of these plates measures half an inch; the antero¬ 
posterior diameter of the external row of plates is also half an inch, and their transverse 
diameter three-tenths of an inch. 
The plates are larger than those of any of the Bracklesham species of the genus, but 
most nearly resemble in form those of M. Edwardsii, from the middle eocene of that place. 
I think, however, that the Indian specimen will eventually turn out to belong to a distinct 
species. 
The association of the remains of a species of Myliobatis with nummulites, and similar 
genera of Mollusca, in the eocenes of Bracklesham and Kach, is noteworthy, and serves to 
indicate that very similar conditions of climate must have prevailed in the two regions at the 
periods of the deposition of these strata. The genus is not known from strata older than the 
eocene, and is still represented at the present day. 
Description of a new Emydine from the upper Tertiaries of the Northern Punjab, 
by W. Theobald, Geological Survey of India. 
Throughout the vast series of beds superimposed on the nummulitic limestone in the 
Punjab, no remains are more common than fragments of different species of fresh-water 
turtle, belonging to the families iEmydinida and Trionyehydce, though in too fragmentary 
a condition to be capable of more than generic recognition. During a late examination, 
however, of the upper Tertiaries south of Jhand, I have obtained two specimens, sufficiently 
preserved to aflbrd a specific diagnosis. Both specimens consist of the anterior portion of 
the shell of a fully adult and aged animal, and embrace the three anterior, vertebral and 
costal plates, comparatively little affected by crust, and one specimen displays (though not 
very clearly) the ventral surface as far as the inguinal opening: the oval plates being broken 
away. Both specimens correspond as regards the structure of their plates, the impressed 
lines marking which are very distinct, though the same amount of individual variation is 
