BIOLOGICAL BULLETIN 



OF THE 



fiDarine Biological Xaboratorp 



WOODS HOLE, MASS. 



VOL. XLIX AUGUST, 1925 No. 2 



CONTENTS 



ANDREWS, JUSTIN M. Morphology and Mitosis in Trichomonas ter- 



mopsidis, an Intestinal Flagellate of the 

 Termite, Termopsis 69 



NELSON, THURLOW C. Recent Contributions to the Knowledge of the 



Crystalline Style of Lamellibranchs 86 



LILLIE, RALPH S., 



and CATTELL, \\ T ARE. The Conditions of Activation of Unfertilized 



Starfish Eggs by the Electric Current 100 



NEWMAN, H. H. An Experimental Analysis of Asymmetry in the 



Starfish, Patiria mini at a in 



V-<, 



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 Entered October 10. 1002. at Lancaster. Pa., as second-class matter under Act of Congress of July 16. 180*. 



