59.11.4:14.77:4.36 



CONTRIBUTIONS FROM THE BERMUDA BIOLOGICAL STATION 



FOR RESEARCH. 



No. 57. 



THE NATURE OF THE CONICAL BODIES ON THE MANTLE 

 OF CERTAIN 1SUDIBRANCHS. 



BY W. J. CROZIER. 



FROM THE NAUTILUS, VOL. XXX, No. 9. 



CAMBRIDGE, MASS., U.S.A. 

 JANUARY, 1917. 



