DESCRIPTION OF PLATES. 113 
locked together, but the anterior and posterior extremities with the 
upper surface of the skull are wanting. The animal was young, its 
last permanent molars not being completely developed, and the third 
milk molar being still in position. The general character is that of the 
present Camel; the form of maxillaries, thickness of lower jaw and ex- 
ternal appearance of the teeth corresponding as closely as two skulls of 
one species would do. The position of the sub-orbitary foramen, how- 
ever, is rather higher up on the maxillary, and the tapering of the 
lower jaw is less than in the existing Camel. This specimen is also 
figured in ‘ Asiatic Researches,’ vol. xix. Plate XX. fig..8.—B.M. 
Length of molar series (including two last premolars), 6°2in. Length of three 
true molars, 4°8in. Height of ramus of lower jaw opposite last molar, 2°7 in. 
Thickness of ramus of lower jaw opposite last molar, 1°35in. Length of molar 
series of lower jaw (including last premolar), 6°3 in. Length of true molar of lower 
jaw, ditto, 5°6 in. 
Figs. 4 and 4a.—Camelus Sivalensis. Cranium including occiput 
and nasal bones. The great width and massiveness of the cranium as 
compared with the muzzle are well seen, and also the antero-posterior 
elongation of the orbit.—B.M. 
Antero-posterior diameter of orbit, 2°3in. Height of ditto, 1‘6in. Between 
anterior angle of orbit and sub-orbital foramen, 2°3in. Length of first and second 
true molars, 2°6in. Widest part of cranial box, 37 in. 
Figs. 5 and 5 a.—Camelus Sivalensis. Lower jaw, which on the 
right side, with the exception of the condyle and coronoid process, is 
almost perfect. Fragments containing molars of upper jaw are still in 
apposition at some places. The specimen shows four incisors on the 
left side; the third right incisor is wanting. ‘The wear of the teeth 
and the flattened surface of the fourth or pointed incisor show that the 
animal must have been of considerable age. ‘This specimen is also 
figured in the ‘ Asiatic Researches,’ vol. xix. Plate XX. fig. 4, a larger 
quantity of matrix containing remains of upper jaw being there still 
adherent.—B.M. 
Between outer margins of canines, 2°5in. Between outer margins of first pre- 
molars, 2°lin. Diastema between canine and first premolar,*7in. Length of 
the molar series, 5:‘9in. Diastema between first and last premolar, 3-in. Length 
of the three true molars, 4°9in. Length of symphysis, 5°3in. Interval between 
rami opposite last molars, 2°6 in. 
IBN) IP.OO-OVOE 
Camelus Sivalensis. 
Figs. 1 and 1 a.—Palate with molar series on both sides imperfect. 
That on the right side is most complete, and contains the penultimate 
and last deciduous molar and the two first true molars —B.M. 
Length of molar series, 4:9in. Length of penultimate milk molar, 4 in. 
Length of last deciduous molar, 1‘3in. Length of first true molar, 1°6 in. Length 
of second true molar, 1:9 in. 
Figs. 2 and 2 a.—Fragment of upper jaw, left side, containing three 
true molars.—B.M. 
Length of true molar series, 4-9in. Length of first molar, 1-3in. Length of 
second ditto, 1-6in. Length of third ditto, 1-9in. Width of grinding surface of 
first true molar, 1°1 in. 
Figs. 3 and 3a.—Fragment of upper jaw, left side, showing the 
