156 Annals of the South African Museum. 



Hwnerus. The right humerus is nearly complete, lacking the 

 proximal end, which is present in a more fragmentary left humerus. 

 The bone is larger than that of Platypodosaurus, but has the same 

 characters except that it does not seem to have the " hook " at the 

 distal end of the deltoid crest. The length of the bone is 295 mm. ; 

 the breadth of the proximal end is 190 mm., and of the distal end 

 175 mm. The minimum breadth across the shaft is 75 mm., and the 

 distance of the top of the ^picondylar foramen from the distal border 

 of the bone is 95 mm. 



Radius. The greatest length of the radius is 215 mm., the breadth 

 of the proximal surface 90 mm., and of the distal 83 mm. The 

 proximal articular surface is an elongate oval, its inner half concave. 

 The distal end of the bone is relatively much stouter than in D. 

 trigoniceps, the articular surface having a thickness of 62 mm. The 

 middle of the shaft is thin. 



Ulna. The ulna is longer than the radius, having a total length of 

 237 mm. The olecranon process is not at all strongly developed, 

 therein showing a difference from that of D. trigoniceps. The greatest 

 breadth proximally is 112 mm. At its narrowest the shaft is 43 mm. 

 broad, and distally the bone is slightly expanded to a breadth of 

 67 mm. The distal articular surface is about, 35 mm. thick. The 

 whole bone is somewhat thinned by flattening. 



Type. Larger part of skull in the American Museum of Natural 

 Historv. 



/ 



Locality. Uitspanfontein, Beaufort West, C.P. 

 Horizon. Lower Beaufort Beds. (Cist ecephal its zone.) 



GENUS CHELYRHYNCHUS, gen. nov. 



CHELYRHYNCHUS LACHRYMALIS, gen. et sp. nov. 



The specimen under consideration consists of an almost perfect 



uncrushed skull collected by the Eev. J. H. Whaits on the Graaff 



Reinet Commonage (S.A. Mus. Coll. 3334). 



It is a medium-sized skull having a maximum length of 200 mm., 



and a greatest breadth across the squamosals of 180 mm. The other 



chief measurements are : 



Interorbital width 30 mm. 



Intel-temporal width . 37 



Basal length . . 179 ,. 



Distance from snout to front of orbit . 50 



Distance between nares and orbit . . 17,, 



Width between caniuiforui processes . . 60 ,, 



