Cope.] 586 {March 7, 
tending behind the anterior third of the length. Basicranial and basifacial 
axes in one line, flattened, the supraorbital border flat, concave on the 
edge ; postorbital processes obtuse, the temporal ridges commencing with 
thin posterior border, which they excavate. The ridges then turn, ex- 
tend parallel posteriorly, terminating in the horn-like processes already 
described, with a slight divergence. The apices mark the posterior third 
of the length of the skull. The occipital condyle is wider than deep, and 
its superior border retreats forwards so as to cause its cup to look upwards. 
The exoccipital diameter at the foramen magnum is less than that of the 
basicranial axis, the osseous element of which, probably sphenoid, is re- 
curved on the sides to their middle. The sides of the latter expand a 
little to meet their lateral ale. Immediately above their contact is situ- 
ated the supposed condyle for the hyomandibular element. The basicranial 
axis is convex opposite the postorbital processes, from the bases of which 
a concavity separates it. It has a slight median groove at this point. It 
is much narrower than the interorbital width above. A short distance in 
front of the postorbital processes it begins to contract, and gradually 
reaches an acuminate apex. Superior to this apex, commencing posterior 
to it, the space between it and the supraorbital or nasal elements is occu- 
pied by a massive element (? ethmoid) which forms the floor of the nasal 
median fontanelle. 
The surfaces are smooth, but readily weather so as to be granular. The 
granules are subround, with flattened surface. 
Measurements of skull. M. 
Total length of skull to end of frontal bone (No. 1)..... .180 
io £6) ee OE MTZ LS TOW OL ONY tL SLRLY ier civibanisie tela ee ORs 
Mi fol COB TOs POSLOM OU! PTOCGSB is! vise vb s'a's 058 
me oth te to apices of trontal cartilages.’ 117 
a ONES th ERO UO OULG COR (ERIDL: hse tlraie oti wD: 
Width, of skull: at pretomtalaaiiis aise witha Wei twain) ORO 
Po Ah KO AE UOMAOR DIAL WOLMONE: sav vate mutnernen ur GOO 
CF OES sO TSU OUIC ED LOO J 6% PLE ee ORS 
OE OCCIDILAL COMMU LGWNGi iy oie gisie sista y Melita eines: ORM 
Depth ‘‘ i CTU OU ately slot uch Hlentioa Miia ae KORO 
Measurements of jars. 
Length of mandibular ramus from cotylus, inclusive. .145 
sais (o MANOIVULAY TAMIUS GY COUVMUB, ies bev. see wave) sORO 
tie . o Vel UCU orth se ace ey eee dO 
Length ‘‘ palatopterygoid bone from cotylus, inc lusive. 145 
Depth ‘‘ i ‘« at postorbital articula- 
tion.. Ve M Ninel iG + eae Heep hap uMneeN tee 
Depth of pulntonter VEO DONG ATOLDIL. .cevievedevyes «U0 
Length“ ui ‘* posterior to orbit....... .070 
A second species has been brought to light by the researches of Mr. W. 
