170 W. C. ALLEE. 



tide tables of the U. S. Bureau of Commerce show a spring tide 

 range of about five feet for this section of Buzzards Bay and only 

 about two feet for Vineyard Sound stations. 



Studies have been made in the following localities i 1 



Wharf Pilings. 



Crane's Wharf Pilings. — This is a comparatively new wharf 

 located near the public steamboat wharf in Great Harbor at 

 Woods Hole. At the shore end the water at low tide comes 

 close to the retaining wall and some collecting has been done 

 annually in the crevices of the wall. The water at the outer 

 end is over twelve feet deep. The number of species and of 

 animals on these pilings has increased noticeably during the 

 period of observation. 



Vineyard Haven Wharf Pilings. — The old New York and 

 Portland Wharf on the south side of Vineyard Haven is located 

 well out toward the Sound. The water here comes up on a 

 sandy beach which at low tide is bare for a considerable distance 

 under the wharf. At the outer end the Government Chart shows 

 II feet of water. In my experience the water is deeper. This 

 is an old wharf with many pilings rotted off below water level. 

 Some of the pilings are reproduced in the American Museum of 

 Natural History in New York. Collections from both wharfs 

 were made from boats by means of the usual scrape nets. 



Marine Biological Laboratory Pier on Glass Slides. — For a 

 number of years, glass slides have been placed under the M. B. 

 L. pier in connection with other studies. In 192 1 the slides were 

 carefully examined by Dr. D. B. Young and myself after they 

 had been suspended in water under the pier from July 1 to 

 August 9 at a depth of about six feet. The M. B. L. supply 

 float containing animals from all parts of the region was only a 

 few feet away and accordingly more species were attached than 

 might normally be found. 



Rocks and Flats. 



Hadley Harbor, Southwest and Southeast Gutters. — These natu- 

 rally narrow rocky gutters have been further narrowed artificially 

 1 Consult map. 



