ln 
Cope.] 508 [April 5, 
crown is much more elevated than that of the tooth first described, and is 
in general shaped likea claw. It may be from the pterygoid bone of 
another genus. 
Measurements. M. 
INNO Oe KO Konae (Chane aa caso5 afonodacnosoaooeoce — Oil) 
ANLELO“VOSUCTION | tp. cin --sie aieia ia U0 
Diameter of crown 
ERANISVETSC? ceva cus oh eierexnnice nice US 
PARIOTICHUS BRACHYOPS. Gen. et. sp. nov. 
Char. Gen. This form is represented by a cranium which has lost its 
superficial osseous stratum at some points, and the entire occipital region. 
The temporal fossee were covered by a roof continuous with the postorbital 
region ; the zygomatic arch extends low down, producing a resemblance 
to certain tortoises. The orbits are small and lateral, and the muzzle is 
short, with terminal nares. Their exact character cannot be ascertained. 
The teeth are rooted, and have compressed obtuse crowns, with cutting 
edge; they diminish in length posteriorly, and do not display any elongate 
canine. The cranial bones do not exhibit any sculpture. 
This genus is quite distinct from the others here described from corres- 
ponding parts of the skeleton. In the constitution of the skull it resem- 
bles Prof. Owen’s genus AVsticephalus from supposed Triassic beds of South 
Africa, but differs totally in dentition. 
Char. Specif. ‘The interorbital width is twice the diameter of an orbit, 
and is nearly flat. The cheeks behind the orbits are swollen ; the canthus 
rostralis is obtuse. The muzzle is obtuse, broadly rounded, and somewhat 
depressed ; the nostrils were not large. The orbitsare subround, and meas- 
ure one half of the length of the muzzle measured axially above. The 
mandibular rami are not deep. The longest teeth are below and in front 
of the anterior border of the orbit; posterior to this point they diminish 
rapidly, and are reduced to a very small size. The crowns of the greater 
number of the teeth are short and much compressed, and the enamel is 
coarsely longitudinally grooved. An anterior mandibular tooth has a sub- 
conic crown. 
Measurements. M. 
Widthvofiskiulliat panietall meson... «+2 lence eee OCO 
Length ‘“ from fs BOR opis oceoan ole 
Interorbital width........ OE IOS MERA oo oon. cu 
Plouuritee thy 1m) ties he tes yee cee chee slates ofa e tA aera eee 
Length of root and crown of a tooth.................. .002 
From the locality of the last species. 
EcrocyNODON ORDINATUS. Gen. et sp. nov. 
Char. Gen. Cranium short and wide, with large post-frontal bones and 
a large orbit. Cranial bones sculptured, but no lyra. Teeth rhizodont, 
with elongate compressed crowns with anterior and posterior cutting 
edges. One of these between the orbit and nostril larger and longer than 
the others, and lying outside of the closed dentary bone. Mandibular 
