EHINOCEEOS ETEUSCUS. 3.59 



Another fine palate specimen in the same Museum is a little more 

 advanced in age, showing on the left side the four milk molars, in 

 place, and all more or less worn, together with the germ of the first 

 true molar not out of the gum. On the right side there are only the 

 last four of these teeth. The three anterior milk molars are worn 

 nearly in the same degree ; the first, being the least worn, shows three 

 distinct fossettes ; the second also shows three fossettes, the middle one 

 of which is caused by the confluence of the ' crochet ' with the outer 

 combing plate. Both these teeth show an intercolumnar tubercle, and 

 the crochet forms a very open angle with the hind barrel ; the same is 

 the case with the last milk molar, which shows no intercolumnar 

 tubercle. None of these milk molars have any internal basal cingulum ; 

 the intercolumnar tubercle is most pronounced in the antepenultimate 

 or second. 



Dimensions. — Length of four milk molars, 5 p 8 in. Length of first, l-'l in. 

 Length of second, l - 5 in. Length of third, 1"7 in. Width of ditto in front, 1'7 in. 

 Length of fourth, 19 in. "Width of ditto in front, 1'7 in. Length of first true 

 molar, 2' in. 



All these specimens are labelled 'Einoceronte a parete internasale, ou 

 Ehinoceros tichorhinus, Cuvier.' i 



IV — Memorandum of Eemains of Eiiinocero.s Etkuscus, etc., in 



Museum at Pisa. (See also Plate XXV. figs. 5, 6, and 7.) 



22nd May, 1859. 



The cast of the skull of the Ehinoceros with the partial septum is not 

 of R. hemita'chus, 2 but of the Val dArno species {R. JStruscvs). The 

 original, which has since been much mutilated, is still preserved in the 

 Florentine Museum. The cast is wonderfully perfect in what concerns 

 the septum, which is distinctly limited to the anterior half, and termi- 

 nates in a thickened portion united to the incisive bone. (See PI. 

 XXVIII. fig. 1.) 



The posterior part of the skull is wanting. On one side there are no 

 teeth, but on the other the premolars and one molar remain. The teeth 

 are worn low, but in the remaining molar the crochet is thick, and at 

 somewhat of an acute angle. There is both a nasal and a frontal horn, 

 and the nasal disc is very rugous. Saw also several lower jaws of Ehi- 

 noceros, some of them evidently of the ' R. Valclarnensis.'' * Another, 

 much larger, and said by Prof. Meneghini to be from the Val d'Arno, 

 is certainly of another species, and probably of R. megarhinus. 



Pisa, 1st June, 1859. 



Examined a very fine specimen of the right ramus of lower jaw of 

 Rhinoceros. The six last molars are in place, and the posterior five are 

 entire; the crown of the anterior molar is broken off. The ascending 

 ramus is broken vertically through the sigmoid echancrure, so that the 

 condyle and angle are missing, but the coronoid is perfect to the very 

 apex, and compares beautifully in its greater dimensions, especially in 

 breadth, with that of Rhinoceros Etruscus. The coronoid rises very 

 vertically. 4 The teeth are all emerged and are very perfect; the cres- 



1 See antca, p. 314. — [Ed.] 



2 As stated in a previous note, and at page 332. — [Ed.] 3 R. Etruscus. — [Ed.] 

 4 Dr. F. seemed to infer that this was the lower jaw of S. megarhinus. See 



page 356, line 13 ; and page 369, line 6.— [Ed.] 



