V 
INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
EOCENE CHELONIANS FROM THE SALT-RANGE. 
BY R. LYDEKKER, B.A., E.G.S., &c. 
(WITH PLATES XII AND XIII.) 
INTRODUCTORY. 
The two specimens, forming the subject of this memoir, were obtained in 1886 
by Dr. H. Warth, by whom they were presented to the Indian Museum. They were 
both obtained at Nila (lat. 32° 29' 30"; long. 73°; in the Punjab Salt-Range; while 
at least the example of Hemichelys (Plate XII) came from a bed situated 10 feet 
below the coal-band of Nila. 1 Erom the same bed Dr. Warth also obtained certain 
other remains, which, according to a manuscript note by Dr. Waagen, with which the 
writer has been favoured, comprise teeth of Lamna , Otodus, and Capitodus, together 
with certain cephalopods allied to Belemnites ; and Dr. "Waagen is of opinion that 
the bed in question belongs to the highest horizon of the “ Cardita beaumonti 
group,’ 5 which is now regarded as a passage-bed between the cretaceous and the 
eocene, although in being more nearly allied by its fauna with the latter than with 
the former is provisionally classed as lowest eocene ; 2 and may not improbably 
correspond homotaxially to the Cernayisian stage of Reims, and the Puerco group 
of the United States. 
The fossils mentioned by Dr. Waagen indicate that the bed in which they were 
found is either of marine or estuarine origin ; and this is confirmed by the Chelonians, 
1 See Wynne : ‘ Mem. Geol. Surv. Ind.’ Vol. XIV, p. 168 (1878). 
2 See Blanford : ‘Mem, Geol. Surv. Ind.’ Vol. XX, pp. 4, 45, 46 (1883). 
