Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLVIII. No. 20.— May, 1913. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF 

 THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 

 COLLEGE.— No. 236. 



THE STRUCTURE OF THE GORGON IAN CORAL PSEUDO- 

 PLEXAURA CRASS A WRIGHT AND STUDER. 



By WAYL.A.ND M. Chester. 



