THE ALGAE OF BERMUDA. 49 



18. C. frascatii sp. nov.; P. B.-A., No. 2164. Humilis, 1-2 

 cm. alta; ramificatione irregulari, inferne plerumque dichotoma, 

 dichotomiis patentibus; superne partim conformi, sed etiam lateral!, 

 patente, saepe rectangular!; ramulis ultimis 1-3-cellularibus, prope 

 vel omnino rectangularibus, saepe secundis latere exteriore rami 

 recurvati; cellulis inferne 70-100 /u diam., 2-5 diam. longis, cylin- 

 dricis; ramulorum 60-80 ,u diam., 2-3 diam. longis, leviter inflatis, 

 nodis eonstrictis; cellula terminali obtusa. 



Low, 1-2 cm. high, branching irregular, below mostly dichotomous, 

 with wide forkings; above partly similar, partly lateral, p&.tent, often 

 at a right angle; ultimate ramuli 1-3-celled, nearly or quite at right 

 angles, often secund on the outer side of a recurved branch. Cells 

 below 70-100 ;Li diam., 2-5 diam. long, cylindrical; in the ramuli 

 60-80 /i diam., 2-3 diam. long, somewhat swollen with constricted 

 nodes; terminal cell obtuse. In matted tufts in tide pools near 

 Frascati Hotel, Jan. 11, 1914, A. B. Hervey. Type in Collins herb. 



Growing in similar places to C. repens, and forming similar matted 

 tufts, but distinct by the smaller dimensions and the lateral, secund, 

 submoniliform ramuli. 



*19. C. FRACTA (Fl. Dan.) Kiitzing, 1843, p. 263; 1854, p. 10, 

 PI. L; Collins, 1909, p. 353; P. B.-A., No. 2013. Conferva frada 

 Flora Danica, Vol. V., PI. DCCCCXLVI, 1782. Artificial Reservoir 

 of fresh water near Spanish Rock, Dec, Hervey. Some of the 

 material is in a vigorously growing state; some in a hibernating state, 

 cells with thick walls, dense contents, few branches. 



Cladophoeopsis Borgesen. 



C. MEMBRANACEA (Ag.) Borgesen, 1905, p. 288, figs. 8-13; 1913, 

 p.' 47, fig. 33; Collins, 1909, p. 362; P. B.-A., No. 1866; Conferva 

 membranacea Agardh, 1824, p. 120. North Shore, Jan., Tucker's 

 Town, March, Harris Bay, Shelly Bay, April, Hervey; Inlet, May, 

 Hungry Bay, July, Collins. A very common species, forming cushions 

 on rocks, and on and under mangroves; in still pools it is sometimes 

 also in floating masses. 



PiTHOPHORA Wittrock. 



*P. KEWENSis Wittrock, 1877, p. 52, PI. I, fig. 8; PI. II, figs. 1-12; 

 PI. Ill, figs. 1-9; PI. IV, figs. 2-11; PI. V, figs. 9-10; Collins, 1912, 

 p. 98; P. B.-A., No. 2072. With Rkizoclonium etc. in reservoir of 

 fresh water near Spanish Rock, Dec, Hervey. 



