PAEZONTOLOGICAL COELEECTIONS 253 
II, extending from the Medina to the Onondaga stages, inclu- 
sive; three-fourths of those in Volume III, which treats of the 
Lower Helderberg and Oriskany groups; more than one-third of 
those in Volume IV, which describes the Brachiopoda of the 
Devonian system from the Upper Helderberg to the Chemung ; 
about 30 per cent. of the specimens illustrated in Volume V, 
Part I, which is devoted to the Lamellibranchiata of the Upper 
Helderberg (or Corniferous), Hamilton, and Chemung groups; 
and a nearly equal proportion of the Cephalopoda and Gastro- 
poda illustrated in Volume V, Part II]. The collection, however, 
contains only about seventy-four of the specimens of Bryozoa 
given in Volume VI, and about seventy of the Crustacea illustrated 
in Volume VII of the Paleontology of New York. Much of the 
material for Volume VIII, on the Brachiopoda, was prepared for 
publication prior to 1876, hence a large proportion of the speci- 
mens used for illustrations are to be found in the American 
Museum, especially of those used for the plates bearing the 
name of R. P. Whitfield. 
Most of the species in the volumes above mentioned were 
first published in the Regents’ Reports on the Condition of the State 
Cabinet (or State Museum, as it is now called), but material from 
other states than New York was also used in these reports, and 
the American Museum has the fossils from the Wisconsin- 
Minnesota Cambrian beds described and figured in the Szxteenth 
Report; the Niagara material from Waldron, Ind., published in 
the Twenty-eighth Report; and the graptolites and the Wisconsin 
Niagara species given in the Twentieth Report. The Trenton 
fossils from Wisconsin described in the Report of Progress of the 
Geological Survey of Wisconsin for 1861 are here, and the original 
descriptions have been republished with illustrations and notes 
by R. P. Whitfield in the Wemoirs of the American Museum of 
Natural Fitstory, Volume I, Part I]. The Museum has all the 
Warsaw fossils from Spergen Hill, Ind., originally published 
without figures by Hall in the 7vansactions of the Albany Institute, 
Volume IV, and republished by Whitfield with figures in Bulletin 
Am. Mus. Nat. Hist., Vol. 1. The collection also includes the 
