S60 EHINOCEROS. 



cents of the first true molar are still distinct ; those of the last are but 

 slightly affected by wear. The specimen was found in the Collines of 

 St. Eegolo. 



Dimensiojis. — Total length of specimen, 15" in. Length of line of 6 molars, 96 

 in. Length of ditto of 3 premolars, 4 - l in. Length of 3 last molars, 57 in. 

 Height of jaw under penultimate premolar, inner side, 3-2 in. Height of ditto 

 under penultimate molar, inner side, 39 in. Height to apex of coronoid, 10'5 in. 

 "Width of apex of ditto, at sigmoid, 17 in. 



V Note on a Specimen of Ehinocekos Etruscus, belonging to the 



Marchese Carlo Strozzi. 

 Leghorn, 2nd June, 1859. 



This is a magnificent specimen of a symphysial portion of a lower 

 jaw with part of the two rami. The rami are broken obliquely, so that 

 only the fangs of two molars are seen in the section. The incisive 

 border is obtusely bifid, with a very pronounced sinus above and behind 

 each of the lobes. There is a narrow alveolar pit, as for an incisor that 

 has dropped out. The symphysial portion is very carinate below, and 

 is completely drilled by large mentary holes, nine on right side and 

 seven on left. Seven of the nine holes on the right side are close to- 

 gether. This is an invaluable specimen. 



Further Note on same Specimen — 1860. 



Mr. Dinkel's drawing is good (See PI. XXVIII. figs. 2, 3, and 4). 

 It shows on the right side the fangs of the anterior premolar, and of the 

 next adjoining tooth. Mr. Dew's cast l is chiefly defective in the great 

 size he has given to the incisive pits, especially on the left side, both in 

 length and in antero-posterior diameter ; the cast also makes them un- 

 symmetrical, which they are not. Dinkel's drawing represents the pits 

 accurately. They are evidently the pits of a small shed incisor. 



Dimensions. — Extreme length of fragment, left side, 7'3 in. Length of diasteme, 

 right side, 25 in. Length of symphysis, at middle, 4-3 in. Width of symphysis at 

 middle of diasteme, 175 in. Greatest width of ditto at protuberances below, 1-85 

 in. Width of ditto at incisive pits, 1-4 in. 



VI. — Description of Upper Jaw of Ehinoceros Etruscus, froji 



Malaga. 



The specimen consists of the greater part of a right upper maxillary 

 bone, comprising in situ the second and third premolars, and the three 

 true molars. The last premolar (p.m. 4) is wanting. The specimen 

 has been fictitiously repaired with cement, placing all these teeth in 

 series, without allowance for the missing premolar, and it is in conse- 

 quence deceptive at first sight. The outer border of the crown is more 

 or less damaged in most of the teeth. Together with Mr. Waterhouse, 

 to whom I referred the fossil, I was at first led to believe that it be- 

 longed to the miocene Aceratherium incisivvm of Kaup, from its close 

 general resemblance to the specimen figured by De Blainville in the 

 ' Osteographie' (Rhinoc. PL XII. ), under the name of Rhinoceros inci- 

 sions oV Auvergne. But I have since arrived at the conclusion, after a 

 fresh examination of the Tuscan collections, that the Malaga Ehinoceros 

 is the Rhinoceros Etruscus, so named by me from its prevalence in the 

 Pliocene deposits of the Upper Val d'Arno. This form has hitherto 

 been confounded, on the one hand with Rhinoceros tichorhinus, and on 

 the other with R. leptorhinus of Cuvier. It had a bony nasal septum, 



1 Now in British Museum. — [Ed.] 



