MOBOSAFRrS AniLTS nEDESCRIBED—OTLMORE. 



158 



disarticulated and scattered condition, so intermingled that, unless a 

 skeleton has become isolated or is still articulated, the several elements 

 composing- it can not be reassembled with the absolute assurance that 

 they pertain to a single individual. The writer is inclined to the opin- 

 ion that the identitication of the manus and pes of 2L agilk has not 

 been accurately made, and until we have more positive evidence it 

 would be well to reserve our decision. 



While Marsh pointed out in his original description that JSL. agilis 

 is the most diminutive member of the Morosaurida^, from our present 

 knowledge of the skeletal structure of the Opisthocoelian dinosaurs, 

 the writer believes that his estimate of the length of Morosaurus agilis 



a 5 



Fig. 2. — MoROSAUKUs agilis? \ nat. size, a, Front view op kii:ht fore khot (Cat. No. fioTl). 

 c, carpal bone; i-v, metacarpals; h, FRONT view of the right hind foot; i-v, digits 

 (Cat. No. 5369), i- nat. size. 



at 15 feet would fall far short of the total length, and it would not be 

 surprising were the skeleton found to exceed twice the original 

 estimate. 



DESCRIPTION OF THE TYPE SPECIMEN. 



With the exception of two genera our knowledge of the skull of the 

 Opisthocoelian dinosaurs is extremely limited. Recently Dr. W. J. 

 Holland*^ has published a very complete description of the skull of 

 DlplodocuH based on all of the known material, and in a preliminary 

 paper Prof. Henry F. Osborn * has mentioned some of the important 



« W. J. Holland, O.steology of Diplodocus Marsh, Memoirs of the Carnegie Museum, 

 Pittsburg, Pennsylvania, II, No. 6, 1906. 



&H. F. Osborn, Nature, LXXIII, Jan. is, 1906, p. 283, tig. 2. 



