370 KHINOCEROS. 



5. Length from posterior plane of occipital condyles to posterior margin of last 

 true molar, 12 - 5 in. 6. Diameter between outer margins of occipital condyles, 

 4-& in. 7- Transverse diameter of left condyle, taken near middle, 1*5 in. 8. 

 Vertical height of ditto, 2-9 in. 9. Diagonal diameter of ditto (greatest), 3 - in. 

 10. Greatest width of occipital foramen, 1*7 in. 11. Height of occipital plane to 

 lower surface of occipital condyles, 95 in. 12. Greatest width of occipital plane, 

 just above the condyles, 6" in. 13. Greatest width of ditto about middle, 5 - 2 in. 

 14. Length of zygomatic fossa, left side, 7'4 in. 15. Length from posterior 

 boundary of zygomatic fossa to posterior surface of left occipital condyle, 7' in. 

 1 6. Length from anterior margin of auditory foramen to anterior margin of the orbit, 

 105 in. 17. Extreme length from anterior margin of 2nd premolar to posterior edge 

 of last true molar, left side, 105 in. 18. Length of last 3 premolars, left side, 4 - 7 

 in. 19. Length of 3 true molars, left side, 62 in. 20. Extreme length of 1st 

 and 2nd true molars, left side, 4-25 in. 21. Length of 2nd premolar, left side, 

 l - 55 in. 22. Transverse diameter of ditto near base, behind, 1'7 in. 23. Antero- 

 posterior diameter of 3rd premolar, left side, 16 in. 24. Transverse diameter of 

 ditto at base, anterior barrel, 2' in. 25. Antero-posterior diameter of last pre- 

 molar, outer surface, T7 in. 26. Transverse diameter of ditto at base, anterior 

 barrel, 225 in. 27. Length of crown of first true molar, outer surface, left, 2- in. 

 28. Transverse diam. of ditto at base, anterior barrel, 2 - 6 in. 29. Antero-posterior 

 diameter of penultimate molar, anterior surface, 2-3 in. 30. Transverse diameter 

 of ditto anteriorly, 25 in. 31. Antero-posterior diameter of last true molar 

 (greatest), 2"1 in. 32. Transverse diameter of ditto anteriorly, 2 - 4 in. 33. In- 

 terval between diastemal ridges at 2nd premolar (inner surface), 1*2 in. 



III. — Note on Rhinoceros Leptorhinus from Ilford. 



British Museum, ISth August, 1859. 



Compared the cast from Montpellier of the last upper true molar 

 with a specimen labelled 'Tooth of Rhinoceros from Ilford, Essex' 

 (No. 40,482). They are both nearly of the same size and stage of 

 ■wear and exhibit exactly the same pattern. The Ilford tooth shows 

 still a kind of vertical cleft for the posterior valley, and a very thick 

 layer of cement in the valley. 



IV. — Note on Molars of Rhinoceros Leptorhinus? from the Bone 

 Breccia of Nice, filling a Cavern in the Jura Limestone. 



Nice Museum, 1 1 th Deec mher, 1858. 



Of the Rhinoceros the finest specimen is a sixth or penultimate 

 upper molar of the left 1 side (PI. XXXII. fig. 3), but very slightly 

 advanced in wear ; unluckily the anterior outer angle is broken off, as 

 far as the middle of the great valley ; but the tooth shows in section 

 the step of the anterior external vertical groove very pronounced, the 

 whole of the great middle valley, the anterior basal bourrelet, the pos- 

 terior valley sheeted over with a very thick layer of cement, the ante- 

 rior and posterior barrels inside entire to the apex, and the crochet 

 quite entire. The enamel is rugous on the outer surface, with vertical 

 strise, but hardly so much so as ordinarily seen in E. tichoy'hhius, and 

 the enamel is not so thick. Both the anterior and posterior barrels are 

 very much compressed at the apex, as shown in the drawing, and the 

 crochet is also much compressed, and given off forwards at a very open 

 angle with the crown of the posterior barrel. The direction of the 

 crochet deviates but little from a straight line ; but the crochet does 

 net join on to the anterior barrel as in R. tichorhinus, a point of great 



1 Left, not right, as identified by Gastaldi. 



