THE ALGAE OF BERMUDA. 121 



rounded lines, the convex side towards the apex of the branch; cysto- 

 carps sessile on the branches; no other organ of fructification ob- 

 served; color dull red; substance rather soft. Type specimen in 

 Collins herbarium, No. 7509, Heron Bay, April 19, 1913, Hervey; 

 also at St. David's Island, Feb., near Wistowe, Dec., Hervey. 



This plant belongs to the subgenus Coelochondria Falkenberg, but 

 is distinct from all but one of the species of the subgenus by the peculiar 

 transformation of the upper ends of the pericentral cells, which show 

 even under a slight magnification as curved lines, two or three showing 

 in the width of the branch. This same character is found in C. 

 succulenta (J. Ag.) Falkenberg, 1901, PI. XXII, figs. 22-23, an Aus- 

 tralian species, but that is a large and fleshy plant. In some speci- 

 mens of C. curmlincata this character is less conspicuous than in others, 

 but it is always quite distinct at the base of a branch, where the 

 cortication is thin. 



2. C. DASYPHYLLA (Woodw.) Agardh, 1822, p. 350; Fucus dasy- 

 pJiyllus Woodward, 1794, p. 239, PL XXIII, figs. 1-3; Laurencia dasy- 

 phijUa Harvey, 1846-51, PL CLII. St. David's Island, May, Hervey. 

 A single plant, well developed and typical. 



3. C. ATROPURPUREA Harvey, 1853, p. 22, PL XVIII. E. Heron 

 Bay, March, Hervey. A single, quite typical plant. 



4. C. polyrhiza, sp. nov.; P. B.-A., No. 2040. Fronde tenui, axi 

 principal! diametrum ^ mm. raro attinente, ramos paullo minores 

 paucos pluresve alternantes ferente, ramulis secundi vel tertii ordinis 

 minoribus brevioribusque, ad basin plus minusve contractis, prope 

 apices conicos foliis brevibus deciduis armatis; ramis ordinum omnium 

 plus minusve flexuosis; cellulis corticalibus linearibus, longitudine 

 latitudinem 3-4-plo superante; tetrasporis in ramulis ultimis, partis 

 fertilis margine subdentato, apice breviacuto; basi a parte inferiori 

 sterili ramuli evidenter distincto, parte fertili diametro partem sterilem 

 duplo superante; segmentis per corticem tantum in parte extrema 

 juvenili manifestis; rhizoideis brevibus unicellularibus in fasciculis 

 densis ex partibus omnibus frondis exeuntibus; substantia subfirma; 

 colore rubro pallido. Plate II, fig. 12. 



Frond slender, main axis seldom reaching ^ mm. diam., with more 

 or less numerous, alternate patent branches of slightly less size, with 

 one or two orders of smaller and shorter branches with more or less 

 contracted bases, and with tufts of short, fugacious leaves near the 

 tapering apices; branches of all orders more or less flexuous; cortical 

 cells linear, 3-4 times as long as wide; tetraspores in ultimate ramuli, 

 the fertile portion showing a subdentate outline, the apex short- 



