116 BULLETIN" 110, UNITED STATES NATIONAL MUSEUM. 



In 1911 x the Rev. H. N. Hutchinson presented the restoration by T. Smit 

 shown in plate 28 (lower figure). The basis of the main figure in this picture is at 

 once indicated by a comparison of this restoration with the skeletal restoration by 

 Marsh. It has practically the same pose and also the incorrect lengthing of the 

 dorsal region commented on above. 



In 1910 and 1911 the type specimen of Ceratosaurus nasicornis was mounted in 

 bas-relief for exhibition in the United States National Museum as shown in plate 

 29. The interest in this reconstruction lies not only in its being the first and to this 

 day the only skeleton of Ceratosaurus thus exhibited, but also that corrections 

 made in the length of the back brings about a truer conception of the general pro- 

 portions of the animal than had hitherto been obtained. The mounted skeleton 

 is composed entirely of the bones of the type individual and only such parts as were 

 missing have been restored in plaster. These are given a conventional color, which 

 at once distinguishes the restored from the fossil parts. 



The pose of the specimen was largely determined by the position of the arti- 

 culated bones as found. The skeleton was mounted by the writer, assisted by Mr. 

 N. H. Boss; but the author must alone be held responsible for whatever discre- 

 pancies are detected. 



In plate 31 is shown a model restoration by the author of Ceratosaurus, done in 

 1915 and depicting his conception of this reptile. It is based on the mounted 

 skeleton shown in the previous plate. In order to depict graphically the flesh- 

 eating habits of Ceratosaurus, the animal is shown completing the kill of a small 

 Camptosaurus nanus, a herbivorous contemporary and one which could well have 

 been the prey of this carnivorous brute. 



REVIEW AND REVISION OF TYPE AND OTHER THEROPOD SPECIMENS. 



Family MEGALOSAURIDAE Huxley. 1870. 



DRYPTOSAURUS? POTENS (Lull), 1911. 



Plate 32. 



Creosaurus potens Lull, R. S., Maryland Geol. Survey, Lower Cretaceous, 1911, pp. 186, 187, pi. 

 14, fig. 4. 



Type specimen. — No. 3049, U.S.N.M. A vertebral centrum from the anterior 

 caudal series. Collected by J. K. Murphy. 



Type locality. — F Street between First and Second Streets, Southeast, Wash- 

 ington, District of Columbia. "From big 40 feet sewer, 45 feet below surface and 

 above high tide level; light clays below ferruginous conglomerate." 



Horizon. — Arundel formation, Lower Cretaceous. 



The original description by Lull, is as follows : 

 The type specimen is a vertebral centrum (No. 3049, U. S. National Museum) from the ferruginous 

 conglomerate of Washington, D. O, which seems to represent a theropod dinosaur otherwise unrecog- 

 nized in the Arundel formation. 



1 Extinct Monsters and Creatures of Other Bays, 1911 (new edition) plate 14. 



