82 LypEKKER— On Stwalik Fossils in the Science and Art Museum, Dublin. 
Sus-oRDER 38: PERISSODACTYLA. 
Family I.—Rhinocerotide. 
C. a. Rumnoceros PLatyruinus, Fale. and Caut.—First or second left upper 
true molar, in a well-worn condition. This specimen is figured on a smaller scale 
in “ Journ. Asiat. Soc., Bengal,” vol. v., pl. xix., figure 6; and of the full size in 
figure 2, plate III., accompanying this catalogue. The teeth of the present 
species, which is a two-horned form, are of extremely rare occurrence; and the 
present specimen is the most perfect known example in this stage of wear. This 
specimen exhibits in great perfection the accessory fossette (0),* formed by the 
union of the large crochet (e) and combing-plate (x), and thus differs from the 
corresponding tooth of the one-horned R. palwindicus (see ‘Pal. Ind.,” vol. iii., 
p- 4, woodcut), which in the same state of wear has no fossette. The two teeth 
are, however, otherwise very similar, especially in the form of the two colles (a, 6). 
C. b. Ruryoceros paLzinpicus, Fale. and Caut.—First or second left upper true 
molar, in an early stage of wear. This specimen is figured on a small scale in 
‘¢ Journ. Asiat. Soc. Bengal,” vol. v., pl. xix., fig. 5; and of full size in figure 3, 
plate III., accompanying this catalogue. The teeth of this species are nearly as 
rare as those of the last, and the present tooth is the most perfect known specimen 
in an early stage of wear. It exhibits very clearly the characteristic points, viz., 
the apposition of the two colles (a, 4); the large size of the anterior collis (a); the 
absence of a “buttress” at the antero-external angle of the crown, and the slight 
prominence of the costze (c, @); the well-developed crochet (e); and the absence, 
in this stage of wear, of an accessory fossette at the extremity of the median 
valley (9). 
C. c. Rurnoceros patzrnpicus, Fale. and Caut.—Right upper milk-molars, 
partially worn. This specimen is figured on a small scale in ‘“ Journ. Asiat. Soc. 
Bengal,” vol. v., pl. xix., figure 2, and of the full size in figure 1, plate II., accom- 
panying this catalogue. The only other known example of the upper milk-dentition 
of this species is in the British Museum, and is figured in “ Pal. Ind.,” ser. x., 
vol. ii., pl. vii.. fig. 3: it is contained in an immature skull, figured in plate lxxiv., 
figs. 1, la, 1b, 1e, of the Fauna Antiqua Sivalensis.” The Dublin example is 
the more perfeet of the two. The grounds for referring these specimens to 
* The letters employed in the figures are the same as those used in “ Pal. Ind.,” ser. x., vol. iii. 
pt. i., where the terms here used’are explained. 
