THE ALGAE OF BERMUDA. 63 



3. Fronds not over 1 cm. high, stolon and base of frond hairy. 2. C. pusilla. 

 3. Fronds to 5 cm. high, hairs wanting or few. 3. C. verticillata. 



4. Fronds flat or with ramuli in one plane. 5. 



4. Ramuli not in one plane. 8. 



5. Frond flat, entire or with proliferations. 4. C. prolifera. 



5. Frond pinnate. 6. 



6. Pinnules flat. 5. C. crassifolia. 



6. Pinnules cylindrical or compressed. 7. 



7. Pinnules narrowed at base and tapering to tip. 6. C. taxifolia. 



7. Pinnules at base somewhat larger than at the curved and mucronate 



tip. 7. C. sertularioides. 



8. Ramuli peltate. 8. C. peltata. 



8. Ramuli not peltate. 9. 



9. Ramuli varying from long-clavate to spherical-pedicellate. 



9. C. racemosa. 

 9. Ramuli short, of various form, the lowest always rostriform. 



10. C. cupressoides. 



1. C. FASTIGIATA Montagne, 1838, p. 19, PI. II, fig. 3; Collins, 

 1909, p. 411. Dingle Bay, March, Hervey; Hungry Bay, April, 

 Collins. Fine, Vaucheria-like tufts or mats on mangroves and other 

 objects near low water mark. The Hungry Bay material seems to be 

 the floating form known as var. confervoides Crouan. 



2. C. PUSILLA (Kiitz.) J. G. Agardh, 1872, p. 6; Weber, 1898, 

 p. 266, PL XX, fig. 6; Vickers, 1908, p. 25, PI. XXXVIII; Collins, 

 1909, p. 412; P. B.-A., No. 2019. Stephanocoelium pusillum Kiitzing, 

 1847, p. 54. Tide pool, Harris Bay, Oct., Nov., Hervey. The 

 branching stolon creeps over the loose sand etc., on the bottom of the 

 pool, forming with other small algae a thin but firm turf, which has to 

 be forcibly torn apart to show the character of the plant. The ramuli 

 are in two or three whorls; in the Bermuda plants these whorls are 

 more closely set than in the forms figured by Mme. Weber and Miss 

 Vickers, and can often be distinguished only by dissection. 



3. C. VERTICILLATA J. G. Agardh, 1848, p. 6; Weber, 1898, p. 267, 

 PL XX, figs. 7-10; Collins, 1909, p. 412; Borgesen, 1907, p. 355, figs. 

 1-3; 1913, p. 121, figs. 95, 96. St. George's, April, Hervey. 



4. C. PROLIFERA (Forsk.) Lamouroux, 1809, p. 332; Weber, 1898, 

 p. 278, PL XXII, fig. 1; Collins, 1909, p. 413; P. B.-A., No. 1872; 

 Fucus proliferus Forskal, 1775, p. 163. Rein; Kemp; Walsingham, 

 Farlow; Walsingham, April, Hervey; Pool by Moore's calabash 

 tree, April, Somerset Bridge, July, Ely's reef, July, Collins. Typical 

 form, passing into 



Forma OBOVATA J. G. Agardh, 1872, p. 11; Borgesen, 1907, p. 359, 



