1872.] A471 [Cope. 
M. 
Width crown of second molar.......... Ge ay ase .. .0045 
“ “between two ‘‘ Bie sa wae et ee Va 014 
ss cs £6 GAMINON as Vide ulstiye re nr ee .005 
From near Black’s Fork of Green River. 
I would refer to Notharctus, my Lophiotherium vasachiense, adding the 
aifth species to the genus. These are NV. gracilis, Marsh, N. tyrannus, 
Marsh, WV. tenebrosus, Leidy, N. robustior, Leidy, and N. vasachiensis, 
Cope. 
HADRIANUS ALLABIATUS. Cope. 
This large land tortoise is nearer in general form to the H. quadratus 
than to the H. octonarius, but differs from both in the absence of the pro- 
jecting lip of the anterior lobe of the plastron, which is thus simply 
truncate. The mesosternum is not cordate, but has much the shape of 
that of H. quadratus, that is, rhombic. The scutal sutures are deeply im- 
pressed. The plastron is strongly concave. Carapace without irregu- 
larities of the surface. Length eighteen inches. 
From the Bad Lands of Cottonwood Creek, Wyoming. 
EMYS8 LATILABIATUS. Cope. 
Represented by a perfect specimen of a tortoise of a broadly oval form, 
and somewhat terrestrial habit. Its prominent characters are to be seen 
in the plastron, of which the posterior lobe is deeply bifurcate, The an- 
terior lobe is peculiar in the unusual width of the lip-like projection of 
the clavicular (‘‘episternal’’) bone, which is twice as wide as in #. Wyo- 
mingensis, and not prominent. Bones all smooth; margins of lobes of 
plastron thickened. Length of shell, one foot. 
M. 
Width-or lip of plastromis 3... esis census 5 eek ees .06 
Depth of posterior notch............ er re ounce -02 
From near Black’s Fork of Green River. 
PROTAGRAS LACUSTRIS. Cope. 
Gen. et sp. nov. 
A serpent of about the size of the existing ‘‘ Pine Snake” (Pityophis 
melanoleucus), and allied to the water-snakes of Tropidonotus and allied 
genera. 
A vertebra before me has the longitudinal hypapophysial groove of that 
group, which terminates in a very obtuse point. The ball looks exten- 
sively upwards. The upper articular extremity of the parapophysis is 
short and obtuse, and the inferior equally so, and directed shortly down- 
wards. The articular face being continuous with each other. It sends 
an obtuse keel backwards, which terminates in front of the ball. The 
angle connecting the diapophysis and zygapophyses is strong, while 
the former was narrow ; in the specimens it is broken. 
