1911] Teller, Fossils from the PalCBOZOic Formations. 173 



from several of the formations in the state that have furnished 

 many types, while considerable material was collected by the 

 assistants on the work of the different geological surveys of the 

 state, of which good use was made. As a rule, however, the type 

 material has been derived from private collections. 



II. LITERATURE. 



The chief palaeontological possessions of the Geological 

 Department of the American Museum of Natural History of New 

 York City is the collection of the late James Hall, which was pur- 

 chased from that celebrated palaeontologist in 1875 and the prin- 

 cipal feature of that collection is the large number of type and fig- 

 ured specimens specially of the palaeozoic species which it contains. 



This collection may well be considered the standard reference 

 collection of all workers in North American palaeozoic palaeon- 

 tology. 



Among these type fossils we find those that were used to illus- 

 trate the sixteenth report of the New York State Museum, col- 

 lected from the Wisconsin Cambrian beds; the Niagara species 

 collected in southeastern Wisconsin figured in the twentieth report 

 of the same institution published in 1867; the Trenton fossils 

 from the Janesville-Beloit area of Wisconsin described but not 

 figured in the Report of the Geological Survey of Wisconsin for 

 1861 ; the latter original descriptions have been republished with 

 figures and notes by the late Prof. R. P. Whitfield, in volume one, 

 part two of the Memoirs of the American Museum of Natural 

 History. In this museum we also find the type specimens used to 

 describe and illustrate Prof. Whitfields' paper on the Phyllocaridw 

 from the Lower Helderberg formation of Waubeka, Wisconsin, in 

 volume 8, 1896, of the Bulletin of the American Museum. 



The type specimens used to illustrate volume four of the 

 Geology of Wisconsin for 1882. by Prof. Whitfield, from several 



