The second representative of the Rhinoceroses1 from the Lower Miocene deposits of the Turgai region belongs to the subfamily A.cemtherimac.2
It is alarge form with elongated skull and long thin limbs. <...> All the skulls are more or less deformed (Pl. I, Fig. 1———2), therefore not all the characters of the skull of the form under description may
be fully reconstructed. <...> The skull is dolichocephalic, with long and narrow nasals. <...> The frontal
region is in all specimens inflected, and the occiput squeered or laterally
distended, the line of the superior profile of the skull being thus distorted.
'l‘he frontal surface is rhomboidal in shape, with a slight longitudinal inflection; cristae parietales prominently expressed and rapidly uniting into alarge
and narrow crista sagittalis (its length varying in different skulls). <...> The occipital shield is apparently feebly deflected
backward; it is high and constricted upward; crista occipitalis forms a
deep sinuosity directed forward. <...> The auricular region has not been uniformly preserved; its structure
may be represented thus. <...> The relation of the latter to the proc. postglenoideus in the extant skulls, owing to the deformation not being uniform, is dissimilar: in the majority it
abuts on the processus postglenoideus, and in one skull alone Ё it is.
apposed to the latter from behind and fuses with it; this latter position
must probably be regarded as normal in the skull of the form under discussion. <...> Proc. postglenoideus is somewhat shorter and more massive than proc.
paroccipitalis. <...> The zygomatic arches are fairly wide (up to 60 mm in the widest
part) and thick (20——25 mm in the part mentioned), are constricted backward, but widen again at the surface of articulation. <...> The anterior margin
of the orbit lies opposite the hind part of M1 (or in the interval M1 ———M”;
in one of the skulls it is removed still further back). <...> The posterior margin
of the naso-maxillary notch is placed between P3—P“ (or P‘ and М‘). <...> The nasals, narrow and long (280 mm in length, 210~22O mm from
the naso-maxillary notch) are separated from the frontals by a suture forming a wide angle opening forward. <...> United throughout their length they
form a slight groove along the median <...>