LIST OF PLATES AJST) MAPS. 



Frontispiece. Head of a typical rookery bull. 

 Drawn from nature liy Bristow Adams. 

 I. — Progressive stages In the dentition of the young and female fur seal. 

 Drawn by Dr. J. C. MoConnell. 

 II. — Progressive stages in the dentition of the male fur seal. 



Drawn by Dr. J. C. McConnell. 

 III. — Liver of young fur seal. 



Drawn by Chloe Leslie Starks. 

 IV. — Uterus of fur seal. 



Drawn by R. E. Snodgrass. 

 v. — Brain of fur seal. 



From photographs by Pierre A. Fish. 

 YI. — Brain of hair seal, Phoca vitulina. 



From photographs and drawings by Pierre A. Fish. 

 Vn. — Brains of seals and bears. 



From photographs by Pierre A. Fish. 

 VIII. — Cranial capacity of the fur seal, young, female and adult male. 

 From photographs of casts of the cranial cavities. 

 IX.' — A typical harem on Gorbatch Rookery, known as harem 25. 



From a photograph by H. D. Chichester. This photograph was taken to show that 

 the painting of numbers on the rooks had no influence on the seals. 

 X. — Massed harems on eastern end of Tolstoi Rookery. 

 From a photograph by H. D. Chichester. 

 XI. — Uterus and ovaries of fur seal. 

 XII. — The northern squid, Gonatus ammnui. 

 Drawn by Anna L. Brown. 

 XIII. — The Alaskan pollock, Theragra chalcogramma. 



Drawn by A. H. Baldwin. 

 XIV. — The silver salmon, Oneorhynchus Msutcli. 

 Drawn by E. L. Todd. 

 XV. — Northern lamprey, Entosplwnus tridentatus. 

 Drawn by A. H. Baldwin. 

 XVI. — Dead piips on Tolstoi in 1892. Showing the former ravages of Uneinaria. 

 ,j From a photograph taken by the British commissioners. 

 XVII.— Dead pups on Tolstoi in 1896. 



From a photograph by C. H. Townsend. 

 XVIII. — Starved pup, and pjip dead from Uneinaria. 

 From a photograph by C. H. Townsend. 

 XIX. — A windrow of pups on Tolstoi. 



These pups were washed from the lower portion of Tolstoi by the gale of August 17, 



1896, and had been long dead. 

 From a photograph by J. M. Macoun. 

 XX. — Part of skeleton of young male fur seal killed on Zoltoi, probably injured by bite of a 



killer, Oi-ea orca. 

 XXI. — The killer, Orca area. 



From a figure by Liitken. 



IX 



