ANNALS 



OF THE 



CARNEGIE MUSEUM 



Vol. IX, Nos. 3 and 4. 



Editorial Notes. 



The work in the Section of Paleontology during the past months 

 has not only resulted in gratifying additions to the material obtained 

 in the field, but in the extraction from the matrix and the assemblage 

 of skeletons of a number of extinct animals heretofore not com- 

 pletely represented in any other museum. 



Mr. Douglass reports from the quarries in Utah which we have been 

 working for a number of years, that he has discovered the greater 

 part of the skeleton of an AJlosauriis, or allied Theropod, a number 

 of skulls of various sauropoda in more or less perfect condition, and 

 the remains of a huge sauropodous dinosaur, which he provisionalh- 

 assigns to the genus Barosaurus, the centra of the cervical vertebrae 

 of which are from three to four feet in length. 



Mr. Peterson has guided Mr. Agostini in the work of restoring a 

 skeleton of Merychyiis, the first complete skeleton of this genus which 

 has ever been mounted. A vast quantity of material representing 

 the Merycoidodonts, collected by Mr. Peterson in Nebraska in former 

 years, has been freed from the matrix and is being studied by him. 

 The Director has devoted much of his time to the study of the skeleton 

 of the huge sauropod which is being mounted alongside that of the 

 Diplodocus. This skeleton, which is undoubtedly in many respects 

 the most perfect specimen of a sauropod dinosaur which has thus far 

 been recovered in North America, tends to show that our conceptions 

 as to the structure of these animals require revision in some important 

 particulars. A monographic paper upon this material will shortly 



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