246 U. S. BUKEAU OF FISHERIES 



The work of the Beaufort (N. C.) biological station has been 

 mentioned in the .section of this report dealing with the investiga- 

 tions on larval fishes, 03'sters, scallops, and diamond-back terrapins. 

 The working efficiency of the station w^as increased through the addi- 

 tion to the personnel of a scientific illustrator, a clerk-,stenographer,^ 

 and a boatman. Dr. S. F. Hildebrand, the director, with the aid of 

 Louella E. Cable, illustrator, pursued as his principal line investiga- 

 tion of the egg and larval development of fishes, and he has also 

 accumulated many data on the rate of growth of several important 

 commercial species. Doctor Hildebrand, assisted by the foreman of 

 the station, Charles Hatsel, is also conducting an extended series of 

 experiments in breeding diamond-back terrapin, James S. Gutsell 

 ha,s continued his study of the life history and habits of the scallop, 

 and H. R. Seiwell and Dr. A. E. Hopkins were engaged during a 

 i^ortion of the year in a study of the oyster. 



The following independent investigators availed themselves of the 

 use of the station for varying lengths of time : Prof. H. V. Wilson, 

 of the University of North Carolina, assi.sted by J. T. Penny, made 

 an investigation concerning the cellular biology of sponges. Dr. 

 Bartgis McGlone, of the University of Pennsylvania school of medi- 

 cine, continued studies of the two previous summers on the effects of 

 hj^drogen-ion concentration upon fertilization of the eggs of the sea 

 urchin, Lytechinus vayiegatits. Dr. Ferdinand A. Ries, of the Uni- 

 versity of Maryland school of medicine, conducted similar studies 

 intended to parallel or check tho,se of Doctor McGlone. Dr. W. C. 

 George, of the University of North Carolina, conducted studies on the 

 histology of the blood of tw^o ascidians, Phallusia hygomiana and 

 Stylea plicata, and of Balanoglossus. C. L. Ferguson, Doctor 

 George's student, made some .studies on the blood of the sea urchin, 

 Arbacia punctulata. Dr. Elinor H. Behre, of the University of 

 Louisiana, continued her studies of the previous summer on color 

 changes in fishes under the stimulus of varying light wave lengths. 

 The foolfish {Monacanthus Mspidus) and the blenny {HypleurochUus 

 gerviinatus) were the principal species used in the experiments. Dr. 

 Bert Cunningham, of Duke University, was engaged for a short 

 period in studying the embryology of diamond-back terrapins, but, 

 due to the necessity of shipping the eggs to his laboratory, incubation 

 progre,ssed unsatisfactorily and comparatively little headway was 

 made. Luang Choola, of the Department of Fisheries of Bangkok, 

 Siam, spent about six weeks at the station, principally to acquaint 

 himself with the diamond-back terrapin-cultural methods followed 

 at the station and to become familiar with some of the commoner 

 forms of aquatic animals of the vicinity. M. W. de Laubenfels, of 

 Oberlin College, visited the .station to acquaint himself with Pro- 

 fessor Wilson's work on sponges and to obtain information from 

 him. 



Studies on the fouling of ships' bottoms, which were carried on at 

 the Beaufort station for a number of years by the Navy Department 

 and the Chemical Warfare Service, have largely been di,scontinued, 

 although a fcAV tests are still under way. 



The Fairport biological station has been mentioned already in 

 connection with the work on fresh-water mussels and pond culture. 



