ee General Notes. [April, 
tions made by him. The following species were found at the lat- 
ter locality : 
Protohippus, ? sp. Dicotyles condoni Marsh. 
LTippotherium seversum Cope. Protolabis transmontanus Cope. 
$ sinclairi Wortman. Merycochærus obliquidens Cope. 
e ccidentale Leidy. Blastomeryx borealis Cope. 
o 
Anchitherium ultimum Cope. 
Considerable interest attaches to the discovery of an Anchi- 
therium and of a Merycochcerus at this locality, as these genera 
ally the epoch to the John Day period, while Hippotherium, 
Dicotyles and Protolabis are Loup Fork genera. 
he Anchitherium ultimum is represented in my collection bya 
nearly complete superior dentition, with palate and sides of skull 
to the middle of the orbits, and top of skull to above the infra- 
orbital foramen. The size is less than that of the A. prestans 
Cope and A. eguiceps Cope (? A. anceps Marsh) of the John Day 
bed, and the dental series has the same length as that of the A. 
longicriste Cope, also of the John Day. 
It is in the cranial characters that this species displays the 
greatest differences from the John Day species. In the first place 
there is a profound and large preorbital fossa, separated from the 
orbit by a vertical bar. The preorbital ‘fossa in the John Day 
species is shallow, and not abruptly defined. In the next place 
e anterior border of the orbit is above the anterior border O 
the last molar tooth. In this it agrees only with the large A, 
prestans ; in the A. eguiceps and A. longicriste the anterior border 
‘of the orbit is above the anterior part of the second superior 
molar. Thirdly, the infraorbital foramen is above the middle of 
the fourth premolar; it is over the posterior part of the third in 
the three John Day species. Finally, the nareal notch marks the 
anterior two-fifths of the diastema; it extends much further back 
in the John Day species, marking either the front or middle of the 
first premolar. The palate extends about as far anteriorly as 1n 
- A. prestans, viz., to opposite the posterior border of the first true 
premolar. : 
y known spe- 
, about equaling the larger individuals of 
The molar teeth are, however, relatively 
the anterior premolars and incisors smaller and more crows” 
The last two premolars are in line, but the second premolar is sêt 
ee ae 
