1913] 
Pearse: Fauna of the Rock Beaches 
9 
were taken concerning: exact location of animals and their habi- 
tat preferences, stomach contents, periods of activity, tempera- 
tures of water and air, direction of wind, and other points of 
interest. A microscope was used in the field to study the stomach 
contents of certain animals and to identify some species, but the 
survey was for the most part macroscopic and no attempt was 
made to collect Protozoa or other minute organisms. The chief 
tools employed were pencil, notebook, and camera — no net or 
other collecting apparatus was used, but specimens that could 
not be identified at sight were preserved for future determination . 1 
1 Thanks are due to the following persons who were kind enough to identify specimens: I. F. 
Lewis, algae; C. C. Nutting, sertularians; J. P. Moore, annelids; W. R. Coe, nemerteans; R. C. 
Osborn, Bryozoa; F. N. Balch, nudibranchs; W. Chester, lamellibranchs; H. A. Pilsbury, barn- 
acles; M. J. Rathbun, Hyas; N. Banks, arachnids, myriapods; A. N. Caudell, Anisolabia; W. S. 
Marshall, W. M. Wheeler, L. O. Howard, insects; W. G. Van Name, ascidians; G. Wagner, fish. 
The writer is also indebted to Prof. J. R. Roebuck who tested the thermometer used in taking 
temperatures. 
