602 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 49. 



The coracoid, which is not present with the Ceratosaurus skeleton, 

 was evidently modified from a figure of that bone in Phillips Geology. 

 The humerus is from another specimen and the radius, ulna, and foot 

 were evidently drawn from those bones pertaining to the type-speci- 

 men of Ceratosaurus nasicomis Marsh. 



From this brief review it becomes 

 at once evident that this figure is not 

 to be relied upon as being of the genus 

 AUosaurus, and it may therefore be 

 dismissed from further consideration 

 in that connection. 



In the American Museum of Natu- 

 ral History in New York is a beauti- 

 fully mounted skeleton of AUosaurus, 

 the fore limbs and feet of which are 

 partially restored. In a letter bear- 

 ing the date 1909, Mr. Walter Gran- 

 ger of the American Museum staff 

 wrote me regarding their composition 

 as follows: 



In reconstructing our own fore limb of AUo- 

 saurus wo had scapula and coracoid, ulna, and 

 one claw. The humerus we got from a cast of 

 the one in Kansas University; the remainder 

 of the limb and foot was modeled from the Cera- 

 tosaurus specimen [Type, No. 4735, U.S.N.M.], 

 which was borrowed from yoiu- Museum. 



Following the Ceratosaurus as a pat- 

 tern the foot was given four digits, 

 whereas the specimen before me shows 

 quite conclusively that AUosaurus had but three digits, with a reduced 

 mtc. III. The phalangial formula in the New York specimen is cor- 

 rect, and the relative proportions of the various segments of the limbs 

 are entirely in accord with the associated material forming the basis of 

 the present paper. In view of the limited fore limb and foot material 

 available at the time of reconstructing this limb and foot of AUosaurus, 



Fig. 1.— Left fore limb of Ceratosaurus 

 (Allosaurus fragilis of Marsh). After 

 Marsh. 



