RHINOCEROS LEPTORHINUS. 307 



This specimen is fractured anteriorly and posteriorly like the other 

 two ; the symphysial portion is missing. The crowns of the molars are 

 very little worn, and are beautifully preserved ; the transverse bourrelet 

 of the outer side is well shown at the two extremities of the penul- 

 timate true molar, and is crenated. The same character is seen in the 

 anterior portion of the last true molar, less so in the antepenultimate, 

 and still less in the last premolar. The margin of the ramus in this 

 specimen is exactly equal to that of the other two fossils ; it belongs 

 like them to the same species, to which the skull must also be referred, 

 i.e. R. leptorhinus (Cuv. pro parte), R. megarhinus (Christol). Of 

 the detached molars, of which there is a large number, all exhibit 

 the characters of R. leptorhinus ; not one can be referred to 7?. 

 Etruscus. 



There are two specimens of the last true molar, upper jaw, one right, 

 the other left, both showing the posterior lobe, instead of the fossette as 

 in R. Etruscus. 



In one of the specimens, that of the right side, the crochet forms 

 a connecting bridge, extending between the anterior and posterior 

 portions. 



XIII. — Description of Remains ofR. Leftorhinus in the Scortegagna 

 Collection at Vicenza. 



May 31, 1861. 



In this collection there is a lower jaw, right side, of a fossil Rhino- 

 ceros found in an osseous breccia, which corresponds exactly with the 

 ordinary breccia of ossiferous caves. The jaw is iractured and covered 

 with a matrix, crammed with fragments of bone. The six last molars 

 are seen ; in the first of these the crown is wanting, but the two fangs 

 remain ; the last is displaced. 'I he first true molar exhibits De Christol's 

 transverse bourrelet, and from all the characters it appears to me that 

 the specimen belongs to the R. megarhinus of Montpellier. 



Dimensions : — 



Length, from anterior part of penultimate premolar, to posterior portion of pe- 

 nultimate true molar, 7'2 in. Ditto of penultimate true molar, 2-(?) in. Ditto 

 antepenultimate ditto, T75 in. 



In the same collection there is shown the corresponding ramus 

 perhaps of the same animal, with four teeth in situ, the last of which is 

 very little worn. There is also a mass of matrix, containing Cyclos- 

 toma elegans, and several other molars of the same species of Rhinoceros, 

 but so involved in the matrix that their crowns are not well seen. 



The crown of the last true molar is worn to the middle, and has an 

 artificial outline of wax round the posterior portion, so that all the 

 characters cannot be seen. From what is exhibited, the specimen 

 appears identical with R. megarhinus. 



There is also a radius of Rhinoceros {leptorhinus ?). The lower part 

 is entire, but the head is wanting, and the bone is broken in several 

 places, so that the distinctive characters are not recognizable. It is 

 described as a tibia of Hippopotamus. 



