2 34 CASE. [Vol. II. 



this respect from the species of Pariasaiirus, as described by 

 Seeley, where they are in two rows period. The positions of 

 the rows are the same in the two genera. The posterior border 

 of the ectopterygoid supports a patch of teeth in several rows. 

 They are much less developed in Pariasmirns. 



" The pterygoids are slender and diverge from the interior 

 part of the palatines outward, backward and upward, to the 

 inner side of the quadrate. They bear no teeth. The sphenoid 

 is deeply grooved on the middle line as in Elgiiiia. Its lateral 

 inferior keels project below the plane of the short basioccipital. 

 There is no evidence that any of the rows of teeth of the upper 

 jaw rise from the palatine bone; they appear to be maxillary 

 in attachment. 



" The specimen of ParioticJius agiiti, on which the above 

 observations are made, possesses, attached to the skull in 

 nearly normal relations, seven vertebrae, a good deal of the 

 scapular arch, and the right humerus. The fifth and sixth 

 vertebrae have slender cervical ribs. The bodies of these, with 

 that of the seventh, are the only ones whose inferior surfaces 

 are exposed. I observe narrow faces for intercentra between 

 them. Of the scapular arch the clavicle and a median element 

 are preserved. The former has a narrow subvertical portion 

 which rests on the anterior edge of the scapula, and a horizontal 

 portion which is considerably expanded, contracting gradually 

 to the middle line. The median element is Z-shaped, with the 

 median portion or stem rather slender. It is broken off poste- 

 riorly so that its apex cannot be described. It underruns the 

 expanded clavicles, and may be, therefore, supposed to be a 

 cartilage bone and a true sternum, and not an interclavicle. 

 A superficial layer of the exposed part of this element is 

 roughened by sculpture, and probably represents the in- 

 terclavicle. The inferior layer of the expanded part of the 

 clavicle is similarly sculptured. The humerus has greatly 

 expanded extremities and a slender shaft of moderate length. 

 The form is similar to that of Pariasaurus. There is an 

 angulation of the distal extremity which represents the con- 

 dyle. Entepicondylar foramen well developed ; no ectepi- 

 condylar foramen." 



