350 RHINOCEROS. 



premolars, and the two others the antepenultimate and penultimate 

 true molars. 



The antepenultimate true molar is worn very low down, and the 

 anterior barrel is broken across diagonally from the outer anterior angle 

 inwards, so that it cannot be fitted to the premolar preceding it. The 

 posterior notched valley is ground down into an isolated pit, with a 

 shelving inner wall (not vertical, as in Rhin. tichorhinus). The trans- 

 verse valley terminates in a very round sweep, without any combing 

 processes thrown into it. The enamel edge is thin, and the surface of 

 enamel very smooth, with an enormous coat of cement. 



The penultimate agrees exactly in measurement with the Swansea 

 tooth, but it is more worn. The posterior valley is spacious and angu- 

 lar, and not yet isolated ; the transverse valley is divided into two di- 

 visions by a bold projecting curved crochet, given off from the posterior 

 barrel ; the posterior division of the valley is roundish lengthwise, but 

 no combing processes ; has a distinct basal tubercle. 



The coat of cement is enormous, and very much like that o f the 

 Swansea specimen. 



The two other teeth which fit are also of the left side ; and probably 

 the penultimate premolar and antepenultimate, both well worn. The 

 posterior tooth has the posterior valley reduced to an oval fossette, iso- 

 lated. The transverse valley is also isolated, with three comb-shaped 

 j>rocesses from the posterior barrel, but none from the outer wall. 



Dim nsions. — Length, along outer edge, 1*7 in. Length of inner ditto, 1*5 in. 

 Width in front, 2"05 in.; width behind, T65 in., approximative. 



These agree very closely with the Swansea measurements. 



The antepenultimate premolar is still more worn ; the posterior fos- 

 sette smaller, less oblong (rounder), and more isolated ; the trans- 

 verse valley has three processes thrown into it from the posterior barrel, 

 but none on the outer side. The tooth has distinctly two barrels, and 

 is too large for the antepenultimate. 



Dimrnsions. — Length, outer side, 1-fi in. Length, inner sido, l'3d in. Width 

 of crown iu front, 1*9 in. Width of crown behind, 1/6 in. 



III. — Memorandum of Skull of Ehinoceros ITemitcechus, in the Col- 

 lection of Major Wood ; from Minchin Hole. (See p. 323.) 



The specimen is a superb fragment, comprising the Avhole of the 

 cerebral part of the skull, but vertically broken through about two 

 inches in front of the posterior termination of the temporal fossa. It is 

 clear from the recent condition of the fracture that the facial part of the 

 skull was broken and destroyed during extrication. The following 

 parts are present. The sphenoidal region quite entire, also the two 

 condyles with the foramen, and nearly the whole of the occiput up to 

 the niche of the occipital crest ; the lateral margins quite entire The 

 two auditory foramina quite entire, also the left mastoid, but the sty- 

 loidal process on both sides broken off. The zj-gomatic arches both 

 broken, but the base present on the left side; and on both sides, but 

 more especially on the right, the greater part of the articulating sur- 

 face for the lower jaw is present, broad, and somewhat of a cordate 

 pattern, with the sinus directed backwards. (See Plates XXIII. and 

 XXIV.) 



