BY an arrangement with the Bermuda Natural History Society, apportunity is offered for a limited number of instructors and research students in zoology and botany to spend a few weeks at the Bermuda Biological Station this summer. Members of the expedition will sail from New York on the steamer Bermudian (Quebec Steamship Co.) at 11 A.M. on Wednesday, June 19, arriving in Bermuda June 21, and r...