TABLE OF CONTENTS. 
VoLuME XV. 
Papers read before the Academy and published in this vol- 
ume. A list of those read and not published, or read only by 
title appears below. 
TARLETON H. BEAN. 
PAGE 
The Habits of the Young of the Pacific Salmon................sececerereeeeeres 182 
H. P. CUSHING. 
Notes on the Areal Geology of Glacier Bay, Alaska...........sseseceeecseeeeee 24 
On the Existence of Pre-Cambrian and Post-Ordovician Trap Dikes in 
ESP RANHON GC ISH IN Sany etc astedaweessessssdslce tees ciesless'otdéroscas atcavecoaneeam 248 
BASHFORD DEAN. 
Is Paleospondylus a Cyclostome ? ......... ssscssccersscsscsccsccccsreccescecescnecs 100 
On the Vertebral Column, Fins and Ventral Armoring of Dinichthys... 157 
HARRISON G. DYAR. 
RECen beN OES ON) DACbeLiaircassiseccatceetecsacsccecna cdiveccissneesslelcsiececas seeeiecs sues 148 
WARREN H. EVERETT. 
Anatomy of the Ear of the Dog-Fish (Galeus Canis) Preliminary Paper 176 
ARNOLD GRAF. 
Adaptation of the Shell of Crepidula fornicata to the Shell ,of Pecten 
PULOUEUA) de aaeds cian ah audeesdoees seas cies okedoenieay eeerines sce swied ralislonanesbecncswack 67 
BRADNEY B. GRIFFIN. 
The History of the Achromatic Structures in the Maturation and Fertili- 
ZabION Of Thalassema..............s.ssdeccecsecscsecccesscscscesccsescescesscesenees 163 
ARTHUR HOLLICK. 
Geological Notes, Long Island and Nantucket..............-:ssseseeeeeeeeeeeees 3 
JOHN DUER IRVING. 
The Stratigraphical Relations of the Brown’s Park Beds of Utah, 153 and 252 
