THE ALGAE OF BERMUDA. 113 



Hypnea. Well developed plants of H. micsciformis are easily recog- 

 nized, but practically everything else is vague and doubtful, and our 

 determinations of other species are only tentative. In regard to the 

 smaller forms, it seems as if no two authors used the same name for 

 the same plant, and even the best authors are often inconsistent with 

 themselves. For instance, J. G. Agardh, 1876, p. 564, under H. cervi- 

 comis, refers to H. spinella Kiitzing, 1868, PI. XXVI, as a synonym; 

 under H. spinella (Ag.) J. Ag., on the next page, he refers to the same 

 plate. We have collections of Hypnea from several stations to which 

 we do not feel willing to give specific names- H. cornuta reported by 

 Moseley proves to be Chondria polyrhiza Collins & Hervey. 



Family RHODYMENIACEAE. 

 CoHDYLECLADiA J. G. Agardh. 



C. rigens (Ag.) comb, nov.; P. B.-A., No. 2186; C.f irregularis 

 Harvey, 1853, p. 156; Sphaerococcus rigens Agardh, 1822, p. 332; 

 Chylocladia rigens J. G. Agardh, 1851, p. 362. In dense matted tufts 

 between tide marks, Harrington Sound, Feb., Farlow; Fairyland, 

 Dec, Collins. Comparison with authentic specimen of Chylocladia 

 rigens shows the identity with Harvey's species, and the fructification, 

 see Collins, 1901, p. 255, is that of Cordylecladia. 



Chrysymenia J. G. Agardh. 



1. Frond with solid terete stipe and vesicular ramuli. 2. 



1. Frond without solid stipe. ' 3. 



2. Branches long, virgate, with spherical or ovoid ramuli. 4. C. uvaria. 



2. Branches short, stout, with larger, pyriform ramuli. 5. C. pyriformis. 

 3. Frond tubular, branches proliferous with constricted base. 



3. C. Enteromorpha. 

 3. Frond compressed, dichotomous or irregularly cleft. 4. 



4. Frond slender, divisions linear. 2. C. halymenioides. 



4. Frond broader, divisions lanceolate or ovate. 1. C. Agardhii. 



1. C. Agardhii Harvey, 1853, p. 189, PI. XXX. A. Cooper's 

 Island, Feb., Farlow; shallow water, Moseley. Apparently rare, as 



