1882.] 457 [Cope> 



The form of the skull is triangular, with rounded apex or muzzle, and a 

 slight contraction behind the nostrils. The latter are near the edge of the 

 jaw and open equally laterally and superiorly. The orbits are of medium 

 size, and areas far from the edge of the jaw as the width of the interorbital 

 space, which is about as wide as the diameter of an orbit. The posterior 

 "table " is flat with decurved lateral edges, which rest in a squamosal su- 

 ture on the squamosal or quadratojugal and quadrate bones. Its posterior 

 angle is produced downwards and backwards to near the distal ex- 

 tremity of the quadrate. The latter slopes posteriorly and downwards. 

 The quatratojugal region is strongly convex in vertical section. The 

 mandibular ramus is strongly incurved posteriorly, from a point opposite 

 the free extremity of the pterygoid. The symphysis mandibuli is short. 



The sculpture is distinct on all the superior surfaces of the skull, and 

 consists of fossae of medium size, bounded by irregular narrow ridges. 

 There are three fossae in 10 mm. The fossae are obsolete on the extremity 

 of the muzzle and on the anterior part of both jaws. 



The teeth are a little longer on the premaxillary than on the maxillary 

 bone. There are five on each, or six, if the tooth below the nostril be- 

 longs to the premaxillary bone, The palatine teeth are much larger. The 

 first, perhaps standing on the external edge of the vomer, is a little pos- 

 terior to the line of the external nostril. The second is half way between 

 the nostril and orbit, and the third is alongside of and just posterior to it. 

 The fourth is opposite a point a little posterior to the middle of the orbit. 

 Their surface is as yet obscured by a thin layer of fine indurated mud, 

 which in some instances cannot be removed without destruction of the 

 tooth surface. 



The intercentra of the vertebrae are, as in Eryops megacephalus, ossified 

 so as to nearly cut off the chorda dorsalis, but unlike that species they are 

 not notched on one side of their lateral apices. The extremities of the 

 neural spines are subquadrate, rounded behind, and flattened anteriorly. 

 The edges of the postzygapophyses are prominent and flared upwards. 



The scapula is robust and flat, having the posterior-external border 

 longest, and concave, and the superior-posterior, convex. In my speci- 

 mens the thin anterior edge is broken. The coracoid appears to be coossi- 

 fied with the proximal external edge of the scapula, and is directed down- 

 wards and backwards. Its extension is small, and terminates in an apex 

 posteriorly, and a thick double edge inferiorly. The glenoid cavity borders 

 this edge, and is small. The epicoracoid if it existed, is lost. The thick 

 inferior edge of the coracoid and scapula, is similar to those of the humerus 

 and vertebral processes, which suggest a cartilaginous cap. The position 

 of the scapula and coracoid is peculiar. If the glenoid cavity is directed 

 outwards, the ribs adherent to them fit their extremities, from which they 

 have been broken, which adhere to the vertebrae. This is probably the 

 natural position. When thus placed, the plate of the scapula is horizontal 

 transversely, and inclined upwards and posteriorly at 30°. The coracoid 



