NEOZOIC INVERTEBRATE FOSSILS 
A REPORT ON COLLECTIONS MADE BY THE 
EXPEDITION 
BY WILLIAM HEALEY DALL 
I. EOCENE FOSSILS FROM ALASKA PENINSULA 
The Tertiary and post-Tertiary invertebrate fossils col¬ 
lected during the expedition and which were confided to 
me for examination and report, were obtained in three 
different regions. 
Beginning with the older formations, the first region 
comprises an area situated on the northwest shore of 
Stepof or Stepovak 1 Bay on the southern side of 
Alaska Peninsula in west longitude about i6o°. Here are 
a couple of small bays or coves, one of which, named alter 
Admiral Chichagoff of the Russian navy, is called Chi¬ 
chagof 2 Cove and is separated by a pair of projecting 
iThe name on the charts, Stepovak, is a corruption of Stepovakho, which is 
the genitive form of the masculine proper name Stepoff, probably one of the 
persons connected with the surveys of this region carried on by the Russian 
American Company, 1840-50. In English the name would have been Stepoff’s 
or Stepoff Bay. 
2 This name is sometimes pronounced by the natives ‘ Chicagoff ’ which is 
merely an erroneous rendering of Chichagoff. 
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