876 PROCEEDINGS OF THE AMERICAN ACADEMY 



328. Callithamnion Dietzi^. Hooper. — Among the algae col- 

 lected by me at Wood's Hole were several GalUthamnia, which I was 

 unable to determine. Some of the specimens which 1 thought might 

 be G. Dietzice proved to be varieties of C. hyssoideum. Three speci- 

 mens, on comparison with the type in the Herbarium of Trinity Col- 

 lege, Dublin, prove to be G. Dietzice, which is apparently rare. 



329. Callithamnion corymbosum, Ag. New York northward. 



330. Callithamnion versicolor, Ag., var. seirospermum, Harv. 

 New York northward. — This is not the only species in which the so- 

 called seirospores are found, as they are also recorded by Zanardini in 

 G. graniferum, Menegh. 



331. Callithamnion plumula, Lyngb. Long Branch, N.J. ; 

 Newport, R.I. ; Gay Head, Mass., «fec. — The var. crispum, which is 

 common in some parts of Europe, does not occur in America. 



332. Callithamnion Americanum, Harv. New York northward. 



333. Callithamnion Pylais^i, Mont. ( Wrangelia, Ag.) Nahant 

 northward. — Fruit ? 



334. Callithamnion floccosum, Ag. Boston, Cape Ann, Mass. ; 

 Portland, Me. 



335. Callithamnion cruciatum, Ag. New York and various 

 places in Long Island Sound. 



336. Callithamnion Turneri, Ag. {Spermothamnion, Aresch.) 

 In several places on Long Island Sound ; Nantucket, very abundant, 

 W. G.F. 



337. Callithamnion RoTHii, Lyngb. (^Thamnidium,T\\\xYet.) In 

 several places on the New England coast, growing on rocks. — The 

 remaining species of Gallithamnion of the Nereis Am.-Bor. are prop- 

 erly Ghanlransice and should be removed from Ceramiacece. 



*338. Cha.ntra.nsia secundata, Thur. on Ghcetomorpha tortuosa. 

 Peak's Island, Me. 



339. Chantransia virgatula, Thur. New Y''ork; Cape Ann, 

 Mass. 



340. Chantransia Daviesii, Thur. Gloucester, Mass., Mrs. J. T. 

 Lusk. 



INCERT^ SEDIS. 



341. PiKEA Californica, Harv. California. 



*342. PiivEA. WoODii, Ag., Bidrag. Vancouver's Island. 



*343. Pikea Grayana, Ag , Bidrag. Vancouver's Island. — The 

 genus Pikea was founded by Harvey, who described P. Gulifornica 

 from stei'ile specimens which had been sent to him. In his Bidrag 



