THE ALGAE OF BERMUDA. 17 



Chlorogloea Wille. 



C. TUBERCULOSA (Hansg.) Wille, 1900, p. 5, PI. I, figs. 1-6; Pal- 

 mcUa ? tuberculosa Hansgirg, 1892, p. 240, PI. VI, fig. 9. On Bostry- 

 chia, Catenella etc., in company with other minute Myxophyceae. 



Family CHAMAESIPHONACEAE. 



Pleurocapsa Thuret. 



P. CONFERTA (Kiitz.) Sctchell, 1912, p. 229; Palmella conferta 

 Kiitzing, 1845, p. 149; 1845-1849, p. 12, PI. XVI, fig. IV. On 

 Rhodochorton speluncarum, in cave, Agar's Island, Aug.; on Gelidium 

 pusillum, Harrington Sound, April, Collins. 



Hyella Bornet & Flahault. 



H. CAESPITOSA Bornet & Flahault, 1888a, p. 162; 1889, p. CLXV, 

 PI. X, figs. 7-8, PI. XI. In dead shells, in company with Gomontia, 

 Mastigocoleus and Plectonema, but usually the least abundant of the 

 four. 



Dermocarpa Crouan. 



1. CeUs scattered. 1. D. soUtaria. 



1. Cells laterally united in pulvinate expansions. 2. D. prasina. 



1. D. solitaria sp. nov.; P. B.-A., No. 2155. Cellula solitaria, 

 clavata, circa 8 jj. diam., supra discum basale paullo majus; superne 

 uniformiter incrassata, vel interdum prope basin parvam expansio- 

 nem annulatam ferente, usque ad apicem rotundatam, circa 20 /x 

 diam.; longitudine ad 75 m; ad maturitatem in duas cellulas divisa, 

 superiore in gonidangium subsphaericum mutanda, gonidia pro more 

 8-12, 5-6// diam., continente; cellula inferiore obconica, supra plana 

 vel concava, contentu laete aeruginoso; membrana crassa, sublamel- 

 losa. 



Cell solitary, clavate, about 8 // diam. above the slightly larger basal 

 disk, increasing in diameter upwards uniformly, or sometimes with a 

 slight ring-like expansion near the base, to the rounded apex, about 

 20 II diam. ; height up to 75 p.. At maturity dividing into two cells. 



