Editorial Comment. 247 
decorates the cover of the classical report on the Fourth 
Geolog^ical District of New York, is not what I regarded it 
to be in my memoir on the Naples Fauna. Trusting to 
the statement which had been made to* me by professor 
Hall that the drawing referred to was ralTaelesque and 
based on ^'arious specimens which had passed into the pos- 
session of W^illiams College, I proceeded to describe and 
figure as the probable type of that species a specimen found 
in the Williams College collections bearing a label in pro- 
fessor Hall's writing. Professor ^Vhitfield's contention is 
that the original drawing was essentially true to nature and 
that the type specimen is in his collection in New York 
city ; consequently that the species which I figured as this 
is something quite different (I had termed it Scytalocrinus 
ornatissi?nus^ and identical with a new species which he 
has termed, as type of a new genus, Maragnicrinus port- 
landicus. I am disposed to believe that professor Whitfield 
is altogether correct in his view of these species values. It 
was a strange bit of my collecting experience that no trace 
of Cyaihocrinus or Cosmocrinus ornatissimus was ever 
found by me in the Portage rocks of lake Erie while the 
other species was. With professor Hall's statement in my 
mind I naturally turned to the Williams College museum 
as the place to find my originals and there they were — so 
labeled by professor Plall" himself. 
John M. Clarke. 
Albany, April ,i, lUOo. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
A Reconnaissance in Northern Alaska, across the Rocky Mountains, 
along Koyukuk, John, Anaktuviik and Colville Rivers, and the 
Arctic Coast to Cape Lisburne, in 1901. By Frank Charles 
ScHRADER. with Notes by W. J, Peters, U. S. Geol. Survey, 
Professional Paper, No. 20. Pages 139; with 16 plates (includ- 
ing 4 maps) and 4 figures in the text. 1904. 
This exploration, crossing the great mountain belt and coastal 
plain of northern Alaska, started from Nulato on the Yukon river, 
ascended its large northern tributary, the Koyukuk, to its branch 
