PALil^OSYOPS LEIDY, AND ITS ALLIES. 
307 
Kliinoceros. The angle formed by the inferior elements of the pelvis was 
probably more acnte than in the Rhinoceros, as in P. paludosus the ischial 
part of the pelvis is longer. We see from the above description that the 
pelvis of Palceosyops paludostis is very different in outline fr(jm that of the recent 
Tapir which is elongated, with a triradiate iliac portion. The dimensions of 
the ischia are very long compared with those of the ilia in this species and approach 
more nearly those of Titanotherium. We should hardly expect to find the pelvis so 
elongated in an intermediate form like that of Diplacodon, but we have seen that 
the diameter of the tarsus of the latter is also elongated and higher than in 
Palceosyops. 
Measukp^ments of Pelvis No. 10,232 — P. fai.udosus 
Total leiifitli of innominate bone .......... -415 
Length of ilium from middle of acetabulum . . ...... -270 
Width of crest of ilium ........... -265 
Width of peduncle ............ -060 
Length of if=cliium frf)m middle of acetabulum . . . . . . . . -loo 
V'idth of iscliium behind ........... .090 
Length of acetabulum ^ ^ ^ ^ ^ ^ ^ ^ ^ . . -063 
Femur, No. 10,282. — There is in the collection of Princeton College a posterior 
extremity of P. pabidosus, including a femur, tibia and the jiroximal portion of the 
tarsus, all belonging to the same individual. The femur is very much crushed and 
consequently abnormally elongated, and we shall therefoi’e take our descrqition 
largely from other portions of femora belonging to the same species. Leidy has 
timired a femur' which he refers to the smaller species of Palceosyops. This speci- 
men is in the Museum of the Academy of Natural Sciences of Philadelphia and it 
is unusually well preserved. After having studied this femur and taken compara- 
tive measurements of it, I believe that it was incorrectly referred by Leidy to P. 
minor. It should have been refeiTcd to the species under consideration. The 
femur of this species is very much like that of the Tapir in its general characters, 
but its proportions are altogether longer and broader. The head is round and 
placed well to the side as in the Tapir. The depression for the ligamentum 
teres is placed nearer the centre of the head than in the latter animal. A slightly 
constricted neck separates the head from the shaft. The region between the head 
and the trochanter is very broad and heavy, and is compressed and narrow. 
The great trochanter is very large and extends from before backward for 
some distance ; its posterior process is strongly recurved and rises somewhat above 
the head of the bone. The distance between the anterior and posterior tuberosities 
of the great trochanter is considerable. This ^portion is strongly concave and is bor- 
dered externally by a prominent crest. The anterior tuberositj’ of the same is very 
prominent and strongly rugose. The form of the great trochanter in Palceosyops is 
very different from that of the Tapir where the posterior tuberosity is much higher 
'Extinct Vertebrata, etc. Plate xxix, Fig. 5. 
41 JOl'E. A. N. S. PiriLA., VOL. IX. 
