Reviews—New York State Museun. 45, 
due regard to the prevailing geological conditions, it will continue to 
produce gold, tin, and tantalite, the capabilities of the field, despite 
its relatively long existence, being by no means exhausted. 
ave dale dike 
VII.—New Yorx Srare Museum. Joun M. Crarx, Director (N.Y. 
State Education Department). Bulletin 90, Paleontology 14: 
CepHanopopA oF THE BrnkMantown [Catcrrexous| anD CHazy 
Formations or THE CHamptarn Basins. By Ruporr RuepEmMaxy, 
Assistant Paleontologist. 8vo; pp. 393-528, plates 1-88. 
Albany, 1906, 
fY\HE Silurian region of the Lake Champlain basin has proved’ 
remarkably rich in fossil remains, which far exceed in abundance 
those collections made by Professor James Hall in his pioneer work 
during the progress of the Geological Survey of 1836-43, chiefly in’ 
the Adirondack region. 
The attention of paleontologists was directed to the ieee 
Champlain basin by descriptions from the pen of R. P. Whitfield 
of the rich fauna derived from the Beekmantown formation at Fort 
Cassin, Vermont. This led to the investigation of the faunas on the 
New York side of the basin, of which Dr. Ruedemann’s work 
(dealing exclusively with the Cephalopoda) is an important part. 
The author makes use in his work of Hyatt’s system in classifying 
his material, believing that it embodies a true expression of the 
natural relationship of the forms, so far as the Nautiloid Cephalopods 
are involved. The generic position of a considerable number of the 
species are, however, left undecided, being provisionally placed in 
the genus to which they appear to be most closely affiliated, the 
imperfection of some of the material at the author’s disposal rendering 
such a course unayoidable. 
After some remarks upon the Cephalopods described by E. Billings, 
from the Quebec Group of Newfoundland, Quebec, and Philipsburg, 
of which about 49 species were described, but very few figured, the 
author presents detailed sections of the Beekmantown and Chazy 
Beds. A description of the species follows, prefaced by a brief note 
upon the terminology employed, which is that of Hyatt, with some 
alterations and additions proposed by Holm and others. 
The species are carefully and fully described, and well illustrated 
in the text and in the plates. A propos of the latter we are glad to 
see lithography brought into use, instead of the cheaper but much 
less satisfactory ‘process’ methods so often resorted to for 
illustrations. 
Synoptic tables at the end of the specific descriptions show that 
out of 71 species 24 are regarded as new. = 
The work concludes with an interesting summary of the se 
of the Cephalopod faunas of the Beekmantown and Chazy formations 
to those of other regions. A bibliography and index are also added. 
A, HF. 
