ABSTRACTS OF PAPERS 127 



An instructive paper on Paleozoic cephalopods, illustrated by diagrams 

 and read, in the absence of the author, by President Loomis, brought 

 forth a discussion by Messrs. Foerste, Chadwick, and Bassler. 



OBSERVATIOXS ON THE MODE OF LIFE OF PRIMITIVE CEPHALOPODS 

 BY R. RUEDEMANN 



{Abstract) 



The purpose of this paper is to record some new observations on the life 

 habits of the earlier cephalopods based on specimens of Orthoceras from the 

 Trenton limestone and Guelpli dolomite of New York, retaining color lines on 

 one side, and others from the Utica and Lorraine shales of New York, showing 

 sexual differences in size, shape, and surface sculpture. 



The Secretary then presented for the author, in his absence, an account 

 of the wonderful anatomical structures preserved in the Middle Cambrian 

 Burgess shale branchiopod Crustacea found near Field, British Columbia. 

 Illustrated by lantern slides and specimens. 



ANATOMY OF MIDDLE CAMBRIAN CRUSTACEA 

 BY CHARLES D. WALCOTT 



(Abstract) 



A presentation of the appendages and internal anatomy of the three Middle 

 Cambrian branchiopod genera, Waptia, Naroia, and Burgessla, preliminary to 

 a more detailed work to be issued in the near future by the Smithsonian Insti- 

 tution. 



The following papers were read by title : 



AMERICAN SPECIES OF THE GENUS SCHWAOERINA AND THEIR 

 STRATIGRAPHIC SIGNIFICANCE 



BY J. W. BEEDE 



GRAPTOLITE LOCALITIES OF WESTERN NORTH AMERICA, WITH DESCRIPTION 

 OF TWO NEW FORMATION NAMES 



BY L. D. BURLING 



(Abstract) 



The greater part of the paper is taken up with summaries and correlations 

 of the available published information with reference to the twelve known 

 graptolite localities in western North America. 



Three new graptolite localities are described for western North America, all 

 in the Desert ranges of Utah, and reported on by Ulrich, whose reports are 

 copied. 



