622 DR. R. BROOM ON 



fossa, and at its outer end meets the squamosal. There is no 

 trace of a pineal foramen. 



Behind the parietals and partly wedged between them is a small 

 interparietal. It forms the upper part of the occiput, and partly 

 divides the parietal from the supraoccipital. 



The supraoccipital forms the middle part of the occiput. It 

 articulates with the exoccipitals, the interparietal, and the 

 parietals. 



The exoccipital forms part of the occipital condyle and passes 

 outwards, fusing with the opisthotic. 



Only a small part of the basioccipital shows in the specimen 

 as the middle part of the condyle. 



The lower jaw is well preserved. The dentary forms the 

 anterior half, and the angular and surangular the greater part 

 of the posterior half. A large oval opening is seen on the outer 

 side of the jaw between the angular and surangvilar. 



A pair of long rib-like bones represent portions of the hyoid 

 apparatus. These are evidently the ceratobranchials, and indicate 

 that Euparkeria had a birdlike tongue. 



There are well-developed sclerotic plates in the eye, which are 

 curved as in the bird. 



Two slightly displaced bones are probably the proatlas and 

 portion of the atlas. There are probably about 9 or 10 cervical 

 vertebrae, of which the upper 3 or 4 are hidden by matrix. The 

 lower cervicals have comparatively short centra. They are 

 practically amphiplatyan or incipiently procoelous. The ribs are 

 double-headed and have small uncinates. There are 2 sacral 

 vertebrae, and apparently 26 presacial. The tail is very long and 

 has powerful chevrons. 



The shoulder-girdle is well preserved. There is a long slender 

 interclavicle which is apparently narrow even at its anterior end. 

 The clavicle is also long and slender. The coracoid * is large, 

 measui"ing 24 mm. in antero-posterior diameter and 16 mm. in 

 its transverse diameter. There is a large oval foramen near the 

 scapular articulation and a little in front of the median plane of 

 the bone. The scapula is long and slender. It measures in 

 greatest length 38 mm., and its lower end is 15 mm. across and 

 the upper end 12 mm. in width. There is no distinct acromion 

 process, and the clavicle has been probably rather loosely attached 

 to the front of the lower third of the bone. 



The humerus is very slender. Its length is 36 mm. Only the 

 outer aspect is displayed, and it cannot be seen whether there 

 is an entepicondylar foi-amen. There is no indication of an 

 ectepicondylar foramen. The deltopectoral ridge is very short. 



The radius and ulna are slender straight bones. The radius 

 measures 32 mm. in length and the ulna is probably slightly 

 longer. The manus is lost from the specimen. 



* Thougli to avoid any confusion I have used the universally accepted term 

 " coracoid," as I have elsewhere recently shown the bone ought more properly' to be 

 called the " precoracoid." 



