54 ROY L. MOODIE 
the posterior half of the parietal. The supraoccipital is almost 
square being slightly elongate transversely. It unites laterally with 
the epiotics with which it forms the truncate table of the skull. The © 
suture separating the epiotic from the squamosal is clearly distinct. 
Although such a position for the squamosal is unusual it is not unique 
since the same character has been observed in Diceratosaurus laevis 
to be described later. The postfrontal is rather small and it together 
with the postorbital forms the posterior boundary of the orbit. The 
postorbital is truncate posteriorly and joins the epiotic broadly. ‘The 
squamosal lies posterior to the postorbital and jugal and borders the 
quadratojugal which is an unusual condition but what significance 
the condition has remains to be determined. Posterior to the squam- 
osal lies the supratemporal which forms the quadrate angle of the 
cranium. The quadratojugal is a small element and forms a part of 
the lateral boundary of the skull. The jugal is a large element and 
forms the entire lateral border of the orbit. There are no teeth 
preserved on the fragment of a maxilla but there are some impressions. 
farther forward which resemble the pleurodont denticles of the modern 
Amphibia. 
The sculpture of the surface of the cranium consists of parallel 
ridges which are separated by grooves equal to them in width. The 
ridges radiate inward on the squamosals and frontals and outward 
on the supratemporals. ‘They are somewhat interrupted on the other 
skull elements. The lateral thoracic shield, which represents the 
right clavicle, is ornamented with a similar sculpturing of uninter- 
rupted radiating ridges. Cope described an atlas in connection with 
this skull but I do not find it. The slender impressions to the right 
of the pectoral shield may possibly represent ribs. They are gently 
curved and truncate at the inner end. 
A nearly complete system of lateral line canals has been detected 
on this skull (Fig. 9). The canals preserved are: the temporal, the 
jugal, the infraorbital, the occipital cross-commissure and the supra- 
orbital. The nomenclature of the canals is that adopted in a contri- 
bution on the sensory canals in the extinct Amphibia now in press. 
The occipital cross-commissure is represented by a row of elongate 
pits such as Andrews? has described for Ceraterpeton galvant Huxley 
t Geol. Mag., Dec. IV, Vol. II, p. 81. 
