OP ARTS AND SCIENCES. 367 



HELMINTHOCLADLE. 



215. IIelmixthora DiVARiCATA, Ag. Key West. 



216. Nejialion 3IULTIFIDUM, Ag. Watcli Hill, R.I., and north- 

 ward. 



217. SciNAiA FURCELLATA, Blvon. Newport, R.I. ; Gay Head, 

 Mass., &c. 



Var. UNDULATA, Ag. {^Hahjmenia undulata, Mont.), of Chili, very 

 much more robust, and quite different in aspect from the type, but still 

 not to be separated by any well-defined character, was found at San 

 Diego, Cal., Mr. D. Cleveland. 



218. LiAGORA VALiDA, Harv. Florida. 



219. LiAGORA PixNATA, Ilarv. Florida. 



220. LiAGORA LEPROSA, Ag. Key West. 



221. LiAGORA PULVERULENTA, Ag. Key West. 



WRANGELIACE.E. 

 « 



222. Wrangelia penicillata, Ag. Key West. 



*223. Wrangelia multifida, Ag. Key West; Europe. — Al- 

 though generally placed together in the same genus, these two species 

 have different kinds of fruit. 



RHODYMENIACE.S:. 



224. Rhodymenia pertusa, Ag. Vancouver's Island. 



225. RnoDTMENiA PALJiATA, Grev. New York northward ; North 

 Carolina, fide Rev. M. A. Curtis. 



226. Rhodymenia Palmetta, Grev. Halifax, N.S. Not yet 

 noticed in New England. California. 



227. Rhodymenia coralltna, Grev. San Diego, Cal. — Speci- 

 mens of a Rhodymenia, belonging to the subgenus Palmetta, have been 

 sent me from San Diego, Cal. The tetraspores are borne on the ex- 

 panded tips of the frond, and I have little hesitation in naming them 

 R. corallina, as they resemble so clo-sely the figure of Bory. Voy. Coq. 

 pi. IG. 



228. EuTHORA CRiSTATA, Ag. Nahant, Mass., northward. Com- 

 mon. Dredged in deep water, off Block Island, by the United States 

 Fish Commission. 



229. Plocamium coccineum, Lyngb. West coast. Common. 

 Very rare on the east coast. 



Var. siNUOSUM, II. & II., resembling P. cornufum, but having the 



