NO. 1519. 



MOROSAURUS AGTLTS REDESCRTBED—GILMORE. 



165 



NOTE. 



The writer take.s this opportunity' to call attention to tio-. 3, Plate 

 XXVIIl, "Dinosaurs of North America'' (reproduced here as tig. 9), 

 which, according to Professor Marsh, illustrates the ischia of Diplo- 

 docus longux. After an examination of the original specimen. No. 

 4275,^' now in the U. S. National Museum, it appears beyond question, 

 as shown by the characteristic union of their distal ends, that these 

 ischia pertain to the pelvis of one of the larger species of the Moro- 

 sauridfe. The greatest length of the better preserved ischium is 

 800 mm. 



EXPLANATION OF PLATP^S. 



Plate XII. 



a. Neural arch of atlas. 

 A\. s]). Alisphenoid. 

 At. Atlas. 

 Ax. Axis, 

 fl. zyg. Anterior zygapophy.sis of axis. 



b. Intercentrum of atlas. 

 B. occ. Basioccipital. 



c. Odontoid. 



d. Intercentrum of axis. 

 Ex. or. Exoccipital. 

 F. Frontal. 

 /. Foramen. 



0. C. Occipital condyle. 



Side view of the j)Osterior portion of the skull, the atlas, axis, and third cervical of 

 Moromurtis agilis. 



Type specimen (No. 5:>,S4) one-half natural size. 



Plate XIII. 



Side view of the type of Moro.^aurn.s agUis (No. 5.S84), one-half natural size. From 

 a photograph. 



"Marsh's original accession number is J1655 . The specimen is from the Morrison 

 Beds of the Jurassic, near Canon City, ('olorado. 



