534 FAUNA ANTIQUA SIVALENSIS. 



second and third true molars. This specimen is also figured in ' Asiatic 

 Eesearches,' vol. xix. Plate XXI. figs. 12 and 13. — B.M. (See antea, 

 p. 234, and PI. XVIH. fig. 5.) 



Length of second true molar, 1*65 in. ; of third ditto, 2" in. 



Figs. 4 and 4 a. — Fragment of upper jaw, containing third and fourth 

 premolars. — B .M. 



Length of third premolar, 'SS in. ; of fourth, -95 in. 



Figs. 5 and 5 a. — Fragment of horizontal ramiis of lower jaw, con- 

 taining three true molars and fourth premolar.— B.M. 



Length of molar series of lower jaw, 5'7 in. Length of true molar ditto, 4'7 in. 

 Length of fourth premolar, 0'9 in. Length of first molar, r2 in. Length of second 

 ditto, 1'4 in. Length of third ditto, 21 in. Length of last lobe of third molar, '6 in. 



Figs. 6 and 6 a. — Fragment of lower jaw, right side, with ascending 

 ramus, condyle, and coronoid process, and containing last molar. The 

 jaw exhibits remarkable differences from the jaw of the existing Camel. 

 It more resembles the lower jaw of Ox, Deer, or Antelope, but is shown 

 to be of Camel by the heel or step on the posterior ascending margin, 

 which is the generic mark of a Camel. In the existing Camel the 

 ascending ramus rises at nearly a right angle to the line of jaw ; it has 

 considerable breadth antero-posteriorly, and its coronoid process is 

 short, straight, and massive. In the' fossil the ascending ramus is as 

 oblique as in the Ox ; it has no excess of breadth antero-posteriorly, 

 and the coronoid process is long, slightly curved back, and slender. 

 The condyle also has a much longer transverse diameter, its proportions 

 are more slender, and the depression on its upper margin much deeper 

 than in the existing Camel. The condyles, however, are not nearly so 

 slight and narrow as in the Ox and Buffalo. This specimen is also 

 figured in 'Asiatic Eesearches,' vol. xix. Plate XX. figs. 6 and 7. — B.M. 

 (See antea, p. 235.) 



Length of last molar, 2-25 in. Length of last lobe of ditto, "7 in. 



Figs. 7 and 7 a. — Fragment of horizontal ramus of lower jaw, con- 

 taining fourth premolar, and the two first and a fragment of third true 

 molars. — B.M. 



Length of fourth premolar, "85 in. Length of first molar, r4 in. Length of 

 second ditto, rS in. Length of fragment of third ditto, 1'6 in. 



Figs. 8 and 8 a. — Fragment of horizontal ramus of lower jaw, con- 

 taining penultimate and last milk molars and first true molar. — B.M. 



Length of penultimate milk molar, "Gin. Length of last milk molar, l'7in. 

 Length of last lobe of ditto, '7 in. Length of first true molar, 1-6 in. 



Figs. 9 and 9 a. — Symphysis of lower jaw with series of six incisors. 

 The fourth incisor, or canine, on left side, also seen. — B.M. 



Chord of the incisor series, 2'65 in. Length of first incisor, "7 in. Length of 

 second ditto, '73 in. Length of third ditto, "6 in. 



Figs. 10, 10 a, and 10 b. — Symphysis of lower jaw with alveoli of 

 six incisors and two canines (fourth incisors). — B.M. 



Width between outer margin of external incisive alveoli, I'Sin. Width between 

 outer margin of canine ditto, 1'7 in. 



Figs. 11 and 11 a. — Symphysis of lower jaw with six incisors and 

 two canines (fourth incisors). — B.M. 



Chord of incisor series, 1-55 in. Width between canine alveoli, 1-5 in. Length 

 of first incisor, 0'5 in. Length of second ditto, 0'55 in. Length of third or ex- 

 ternal, 0'65 in. 



