398 V' S. BUREAU OF FISHERIES 



eral public to inspect the station's exhibits of marine animals, fishing 

 equipment, and methods developed for increasing the propagation of 

 oysters and the diamondback terrapin. 



Research. — Operation of the Beaufort laboratory was continued 

 throughout the year under the direction of Dr. H. h\ Prytherch and 

 furnished facilities for the study of fishery problems of the South 

 Atlantic and Gulf region. The chief investigations conducted here 

 by the Bureau's stafi', as reported in detail elsewhere, consist of (1) 

 physiological effects of Louisiana crude petroleum and oil-well brines 

 on the oyster; (2) studies of a protozoan parasite of the oyster asso- 

 ciated with mortalities in Louisiana and Virginia; and (3j cytologi- 

 cal studies of the ova and germ-cell cycle in two species of shrimp. 

 The laboratory serves as headquarters for oyster investigations in the 

 South Atlantic and Gulf States and, in cooperation with the conser- 

 vation departments of North Carolina, South Carolina, and Flor- 

 ida, directs extensive operations for the rehabilitation of public 

 oyster beds with funds provided by the Federal Emergency Kelief 

 Administration. Field investigations have also been made of the 

 serious destruction of oysters in Apalachicola Bay, Fla., by a flat- 

 worm parasite, Stylochiis iniTnicus^ commonly known as the ''' wafer " 

 or " leech." 



Laboratory facilities for marine research have been furnished to 

 27 investigators from other institutions who were engaged in the 

 following studies: Dr. H. V. Wilson, University of North Carolina, 

 the biology of sponge cells, with i^articular reference to the fine cyto- 

 plasmic reticula formed in metamorphosing larvae and regenerative 

 masses ; Irene Bolick, University of North Carolina, dissociation and 

 reunition of sponge cells of several local species; Dr. A. S. Pearse^ 

 Duke University, assisted by H. W. Hatsel and E. D. Huntley, eco- 

 logical studies of estuarine animals; Dr. Bert Cunningham, Duke 

 University, effect of temperature on embryonic development of the 

 diamondback terrapin ; Dr. Paul L. Risley, State University of Iowa, 

 transplantation of reproductive organs and sex differentiation in the 

 terrapin; Dr. George G. Scott, City College of New York, compara- 

 tive histology of marine fishes ; Dr. and Mrs. B. G. Chitwood, United 

 States Department of Agriculture, identification and distribution of 

 free living marine nematodes ; Dr. W. C. George, University of North 

 Carolina, studies of chordate blood and regeneration in the ascidian 

 Stj^ela; Dr. Hoyt S. Hopkins, New York University, respiration in. 

 marine mollusks in relation to oxygen tension ; Dr. W. E. Buliington, 

 Randolph Macon College, studies of marine ciliates; Dr. Lowell E. 

 Noland, University of Wisconsin, morphology and taxonomy of cili- 

 ate protozoa, particularly those of the order Peritricha; L. Lyndon 

 Williams, Rensselaer Polytechnic Institute, tissue regeneration in 

 hydroids and related forms; Reinard Harkema, Duke University,, 

 parasites of rodents occurring on the coast of North Carolina; Dr.. 

 Hugh H. Darby, Bartol Research Foundation, regeneration of cheli- 

 peds in Alpheus and Uca ; G. Robert Lunz, Jr., Charleston Museum,. 

 Stomatopoda of the Beaufort region; Dr. J. Paul Visscher, Western 

 Reserve University, rare species of barnacles. 



In cooperation with the Federal Emergency Relief Administration,, 

 laboratory facilities were provided for the employment of eight col- 

 lege-trained women on a research project covering studies of the com- 



