Text Figures 



Page 

 Change in A of blood of Mustclus due to immersion in fresh water until 



death 15 



Change in A of blood of Mustelus due to immersion of fish in a hypertonic 



solution of sea-water until death 18 



Relations of the A of blood to A of different solutions of sea-water 20 



Respiratory movements in Mustelus 24 hours after destruction of spinal 



cord 21 



Changes in A of blood of Mustelus due to immersion in fresh water fol- 

 lowed by return to sea-water 23 



Changes in the A of blood of Squalus due to transference from harbor 



water to fresh water 33 



Diagram showing comparative A's of blood of Mustelus in sea-water, N ; 

 in fresh water, F ; and of saline solution, S, in which blood is first 

 laked 38 



Showing the difference between the ratios of volume of corpuscles to 

 plasma in normal blood, N, as compared with blood taken from fishes 

 after immersion in fresh water, H 38 



Showing the hemolytic effect of different NaCl solutions on the erythro- 

 cytes of four species of elasmobranchs and six species of teleosts 42 



Showing changes in blood pressure of Mustelus canis due to immersion in 



fresh water 56 



Showing the change in the character of the respirations during an hour 



after immersion of Mustelus in fresh water 57 



Showing changes in heart beat of Mustelus due to immersion of fish in 



fresh water 58 



Showing changes in blood pressure and heart beat of Squalus due to trans- 

 ference from harbor water to fresh water from 11.06 a. m. to 3.56 p. m.. 60 



Comparative rate of respiration and heart beat in Mustelus in sea-water . . 62 



Stereogram of a portion of the Central Wasatch Mountains, Utah 89 



Section exposed between mouth of Big Cottonwood and the head of Mill 



Creek Canyons 93 



Section from Big Cottonwood Canyon northward to Willard, Box Elder 



Co., Utah 98 



Sections to show the great unconformity between the Mississippian and 



Pennsylvanian in the Wasatch and Uinta Mountains, and its value in 



the Oquirrh Mountains 119 



Section between Argenta, in Big Cottonwood Canyon, and Alta. in Little 



Cottonwood l'^4 



Geological sections across the Lockatong formation from northeast to 



southwest 149 



