276 Annals of the South African Muscw/n. 



primitive than Cynognathus or Gomphognathus. Most probably the 

 rotation of the skull was effected round the occipital condyles, and 

 as the condyles became divided and rotation impossible there the 

 odontoid process took up the function. 



There is a distinct intercentrum between the axis and the third 

 cervical, and the body of the third cervical is very deeply concave 

 very possibly notochordal. 



I have named this most important genus after the distinguished 

 palaeontologist, the late Dr. George Baur, of Chicago University. I 

 had not the good fortune to be acquainted with him, and even now 

 know nothing of him but his work. But it has long seemed to me 

 that the character of that work was such as entitled him to a higher 

 rank among palaeontologists than has been generally assigned him. 

 By treating palaeontology as a branch of zoology rather than of 

 geology, he has done much to assure that for all future time every 

 palaeontologist must be in the first place a zoologist. 



ECCASAUKUS PEISCUS, g. et sp. nov. 



The type of this new genus and species is a large humerus, found 

 by Mr. J. L. Cairncross in the Ecca beds about twelve miles N.W. of 

 Prince Albert, and probably near the same horizon as Archaosuchus 

 cairncrossi. In giving a name to a humerus I have departed from 

 my almost invariable rule of only making types of skulls or teeth. 

 But as fossils are extremely rare in the Ecca beds, and the gigantic 

 lizard-like form represented by this humerus is not likely to be 

 confused with any other animal, as it is of quite a different type from 

 any previously discovered, I think it well to name it. 



It measured 344 mm. in greatest length. The upper end is 

 179 mm. broad and the lower end 207 mm., and the plane of the 

 upper end makes with the lower an angle of about 25. In the 

 middle the shaft is constricted, so that its broad diameter measures 

 only 72 mm. About 122 mm. above the lower end is a well-de- 

 veloped entepicondylar foramen. From the outer side there passes 

 forward a fairly well-developed delto-pectoral ridge, whose plane is 

 for the greater part at right angles to the plane of the lower end of 

 the bone. The point of the ridge is situated about 216 mm. from the 

 distal end. Unlike the ridge in the Anomodonts, it is not continued 

 on to the upper end of the bone, ending about 80 mm. short of the 

 head. 



Of previously discovered humeri only one, so far as I am aware, 

 agrees with the present type in all essentials, viz., the humerus of 



