mum d l^t Pttsatm ai (H^omparatifae ^aaloQis 



at harvard college. 

 Vol. v. No. 2. 



REPORT 



HYDROIDA 



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

 ASSISTANT UNITED STATES COAST SURVEY. 



[PCBLISHED ET PERMISSION OF PkOFESSOE BENJAMIN PeIRCE, SUPERINTENDENT D. S. COAST SURVEY.) 



BY 



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



PKESIDEST OF THE LINN.EAN SOCIETY, MEMBER OF THE ROYAL DANISH ACADEMY OF SCIEN'CES, 



EMERITUS REGIUS PROFESSOR OF NATURAL HISTORY IN THE 



UNIVERSITY OF EDINBURGH, 



ETC. 



WITH THIRTY-FOUR PLATES. 



CAMBRIDGE: 



WELCH, BIGELOW, AND COMPANY, 



2Snitoetsits IPttSjS. 



1877. 



