402 RHIA T OCEEOS. 



VII. — Memo, of Jaw and Molars of Rhinoceros Antiquitatis in the 



Museum of Le Put. 



September, 1863. 



Examined a lower jaw, left side, broken in front and behind, of 

 Rhinoceros tichorhinus, and two detached upper and three lower molars 

 of same species, labelled Rliinoc. Mesotropus, by Aymard, in his 

 handwriting. The jaw is youngish and contains the last five molars in 

 situ, the last not quite emerged. There is also a block of plaster of 

 Paris containing four molars, not consecutive, of upper jaw, right side 

 {i.e. two true molar3 and two premolars), named R. Mesotropus in 

 Aymard's handwriting. According to Aymard, both R. megarhinus and 

 R. tichorhinus belong to his R. Mesotropus. The specimens are from 

 ' Atterissements de Paradis pres Espaly.' 



VIII. — Note on Specimens of R. Antiquitatis in Maidstone Museum. 



September 28, 1863. 



In this collection I found five upper molars of Rhinoc. tichorhinus, 

 from Stroud ; six upper molars, including two fine last upper, from the 

 brick-earth at Thornhill, at back of Maidstone Jail, one of which is 

 very remarkable and ought to be figured ; the lower end of a right 

 humerus from Burham ; and the fragment of a tooth, far advanced in 

 wear, from the railway cutting near St. Peter's Church. 



NOTES ON DENTITION OF LIVING SPECIES OF 



RHINOCEROS. 



I. — Note on Rhinoceros Keitloa. 

 Saffron Walden, Octobers, 1861. 



The Saffron "Walden Museum contains a beautifully perfect skeleton of 

 an adult Rhinoceros, got at the same time as the Elephant from Algoa 

 Bay (see antea, p. 2G5), but the ticket indicating South Africa. It 

 bears the name of Rhinoceros camus or R. simus of Burchell. 



In the upper jaw there are seven molars all protruded, but the last 

 true molar barely touched by wear. There are four , premolars and 

 three true molars. The premolars are surrounded by a distinct basal 

 cingulum ; but in the progress of wear only two pits have been left, and 

 the form of the crown is exactly that of the two-horned Rhinoceros of 

 Sumatra, and totally different from the Tichorhinus pattern. Unfortu- 

 nately the two intermaxillary bones have been lost or omitted in 

 mounting the skeleton, but it is apparent that there was a short dia- 

 stemal edge in front of the first premolar. 



As regards the lower jaw the dentition is quite complete. There 

 are four premolars and three true molars, all of them affected by wear, 

 except the last. The first premolar has a flattened crown, with a single 

 fang, and is of moderate size, immediately in front of which is the 

 nearly filled up alveolus of an outer incisor which had been shed, and 

 of which the fang-pit is in progress of filling up. Inside of it there is, 

 on either side, and immediately contiguous to it, the pit, nearly eradi- 



