trnam ai tl^t glustum of Compuratibe ^ijulojgn 



at harvard college. 

 Vol. v. No. 2. 



REPORT 



H Y D K O I D A 



COLLECTED DURING THE EXPLORATION OF THE GULF STREAM BY L. F. De POURTALES, 

 ASSISTANT UNITED STATES COAST SURVEY. 



[Published by permission of Professor Benjamin Peirce, SuPERiNTENDEirr U. S. Coast Survxt.) 



GEO. J. ALLMAN, M.D., LL.D., F.R.S., M.R.I.A., Cor.M.Z.S.L.,F.R.C.S.I., 



PKESIDENT OF THE LINN.«AN SOCIETY, MEMBER OF THE ROYAL DANISH ACADEMY OF SCIENCES, 



EMERITUS BEGIUS PROFESSOR OF NATURAL HISTORY IN THE 



UNIVERSITY OF EDINBURGH, 



ETC. 



WITH THIRTY-FOUR PLATES. 



CAMBRIDGE: 



WELCH, BIGELOW, AXD COMPANY, 



^nttorrsitg ^rrss. 



1877. 



