J870.] 



SENATE— No. 170. 



37 



Our thus working together, as it is thought, has been a means 

 of good to them and of economy to the Museum. Accordingly, 

 in reviewing the labors of the year, I feel that something has 

 been done, a little progress made, in the work under my hands, 

 toward the realization of the purposes of the Director. All 

 things considered, and so far as I can judge of other depart- 

 ments from what has been accomplished in my own field of 

 work, the prospects of the institution, as intended to carry out 

 the high ends and to reach the grand scientific results implied 

 in a Zoological Museum, were never brighter than they are to-day. 



Report on the Collection of Fossil Vertebrates, by Dr, 

 G. A. Maack. 



I arrived at Cambridge, May, 1869, having come to this coun- 

 try in order to take charge of the collection of fossil Vertebrates 

 in the Museum of Comparative Zoology. After my arrival I 

 found it absolutely necessary to submit those fossils which had 

 been collected for years past, but which had never been arranged 

 according to a scientific classification, to a close investigation. 

 I began with the fossil Mammalia, and endeavored to collect 

 the various materials in tliis department, scattered over the 

 Museum, in various cases and boxes. Nearly all of these fossil 

 Mammalia, that is, bone by bone, tooth by tooth, I have now 

 determined, labelled and catalogued. I am happy to be able 

 to report that I have found among this mass of fossils a larger 

 number of species and genera than I at first expected to find. 

 Nevertheless, there exist certain gaps in this department of the 

 Museum, which, however, I hope to be enabled to supply, dur- 

 ing the ensuing year, through the assistance of my friends in 

 Europe. 



The following list exhibits what I have so far determined : — 



Elephas primigenius Blumenb., . . . .20 specimens. 



Mastodon ahgusticlens Cuv., 30 " 



Mastodon longirostris Kaup, 2 " 



Mastodon giganteus Cuv., 6 " 



Rhinoceros tichorhinus Cuv., 33 " 



Rhinoceros incisivus Cuv., 26 " 



Rhinoceros leptorhinus Cuv., . . . . .6 " 



Rhinoceros Steinheimensis Jager, .... 9 " 

 5* 



