Cope.] 474 [Aug. 15, 
found on this continent are Cretaceous, and the mode of attachment of 
pubis in these species resembles nearly that seen in Notomorpha, both 
differing from most recent genera in this respect. 
NOTHAROTUS VASACCIENSIS. Cope. sp. noy. 
Represented by a portion of the left ramus of the lower jaw, containing 
one tooth in perfect preservation. The structure of this indicates it to 
be the second true molar, and presents certain features of distinction 
from the same tooth of the Lophiotherium syloaticum, described by Dr. 
Leidy. The crown presents four tubercles which are arranged in pairs, the 
separation between the right and left lobe of each being slight, thus giving 
the tooth the appearance of having two transverse crests as in Hyrachyus. 
The two anterior and outer posterior tubercles are fissured by wearing, 
but the inner posterior consists of two acute crests which meet, presenting 
an acute angle towards the adjoining tubercle. The outer posterior 
tubercle sends a descending crest obliquely to the base of the inner 
anterior tubercle as in ZL. sylvaticwm. A small tubercle occupies the 
space behind the interval between the posterior tubercles and gives 
origin to a cingulum which passes round the bases of the outer tubercles. 
It extends round the front of the tooth to the outer anterior tubercle. 
Wear would produce small angular crescents from the two posterior and 
the outer anterior tubercle. Greatest length of crown, M. 0.008 ; width, 
.006. The enamel of the tubercles is rugose. 
This ungulate was of about the size of the L. syloaticum, or equal to 
the raccoon. It differs considerably from that species in the less isolation 
of the tubercles of the molar, and the crescentic form of the inner pos- 
terior. 
Found by Samuel W. Garman, in the strata of the Wahsatch Group, 
N. E. of Evanstown, Wyoming. 
Noromorpua. Cope. 
This form is one of the Plewrodira, and differs from most of those 
already known in the recent and fossil states, in having many features 
relating it to a terrestrial rather than an aquatic life. The elements of 
the carapace and plastron are massive, and the former was well arched ; 
both exhibit well defined grooves for the sutures of the dermal scuta. 
The mesosternum is broad ovate, and the bones of the plastron are united 
by immoveable sutures. The elevated lateral processes of the hyo and 
hyposternal bones, are not broad, and unite by suture with the lower 
plate of the first and last bridge-marginal bones. They are thus recurved 
in both cases, but none of the ribs indicate any sutural union, as is seen 
in various genera. The costal bones unite with the marginals by serrate 
suture. 
In one species a large intergular scutum has left its impression, the 
gulars being lateral and rather small, The anterior lobe of the plastron 
is emarginate. 
The sutural union of the pubis with the xiphisternum is by an elongate 
