478 The Creodonta. [ May, 
THE CREODONTA. 
BY E. D. COPE. 
(Continued from the April number, page 353.) 
To genus Ictops is found from the Bridger epoch up into the 
Oligocene or White River Miocene. It thus has much the range 
of the genus Hyzenodon, There are three species, of which I givea 
cut (Fig. 21) of the Z. dicuspis Cope, from the Wind River beds of 
: f ; iew of ti 
FIG. 21.—Jctops bicuspis Cope, skull, natural size. Fig. æ, oblique view © s 
andibular ramus es a 
From the Wind River Eocene, Wyoming. Original, from Report of Y. > 
Survey Terrs., Vol. 11. 
IG 
side; 4, do. of inferior side, injured posteriorly; c, m 
š Sei Gu ines 
Wyoming. In this form, as in Leptictis, the incisors and canine 
are spaced. The White River species is the Jctops presi 
Leidy. But one species of Mesodectes is known, the Colorado 
‘us Cope. from the White River beds of Northeastern i 
I discovered a good deal of its skeleton, which forn a 
of its general characters. Its skull, like that of the oe 
haydeni Leidy, possesses the marsupial character of a eae 
sal foramen (Fig. 22 ss), but the resemblance to this one 
„sternum, 
besides only the dentition. There is a large keeled ly urrowing 
stouter and shorter than that of a mole, suggesting ĉ hort, and 
habit, but the humeri are not robust. The neck is very $ cerebral 
the cervical vertebræ are without neural spines. are cere 
hemispheres of the brain leave the olfactory lobes and They £ 
bellum entirely exposed, and are wide and sho | was about 
smooth, but the sylvian fissure is visible. This animà s). 
the size of the European hedgehog (Erinaceus ae jayde 
` As yet but one species of Leptictis is known, e 
