I I I 0LLIN8 \\D ill i;\ I 1 . 



& Ramuli clustered. LO. I Juris. 



8. Ramuli not clustered. 

 Ultimate ramuli very short, often of a single cell; cella in ramuli ovoid, 

 l 2 diam. long. 8. ('. brachyclona. 



'.». Ultimate ramuli not extremely short, cylindrical or Dearly so. 



13. ( '. iitriculosaH 

 10. Cells generally with a sharp constriction near base. '■'>. C. eonstricta. 



10. Cella without regular constrictions. LI. 

 11. Fronds floating except at earliest si 12. 

 11. Fronde always attached during active growth. 13. 



L2. Main filaments 30-60 ft diam. 1. C. crispula. 



12. Main filament-. LOO L50p diam. 7. ('. <\: 



L3. Main filaments distinctly angled <>r flezuous. 1 l. 



L3. Main filaments straight or oearly so. 1">. 



M. Pale yellow-green; cells 6 8 diam. Long. 2. C. luteola. 



11. Light to bright green; cells 2-6 diam. long. 6. C. flexuosa. 

 15. Main filaments 60 n diam. or L 1. C. delioatula. 

 1"). Main filaments 80 /i diam. or more. L6. 



li'.. Some branches decumbent, attaching by rhisoids. 5. C. corallicola. 



16. No decumbent branchi 17. 



17. Color pale, glossy, substance soft. 9. C. crystallma. 



17. Color darker, substance crisp. L8. 



In. Cells 3-6 diam. Long; ramuli scattered. 11. C. piscinae. 



is. Cells mostly t— 2 diam. Long; ramuli closer and seriate. 



12. C. rigidula. 



1. ('. del k \ti i \ Montagne, L850, p. 302; Kiitzing, l s ~> , '>. p. I, 

 PL I. fig. 2; Collins, 1909, p. 337; P. B.-A., No. 2070. Ely's Harbor, 

 April, Hervey. Some of the plants were young and vigorous, reaching 

 a length of 10 cm.; others were evidently old, the main branches with 

 laminate walls up to L5/u thick, and covered with minute epiphytes; 

 new proliferous growth was very abundant, with delicate, thin walls, 

 and generally like the younger plant-. 



2. C luteola Harvey, L858, p. 81; Collins, L909, i). 338. Rein; 

 Merriman in Parlow herb. We have not collected this species, and 

 only these two records exisl for Bermuda. 



:;. C. constrict* Collins, L909a, p. L9, PL LXXVIII, figs. I 5; 

 L909, p. 339. Hungry Hay, Feb., Hervey. Not over 3 cm. high, 

 while the original material from Jamaica reached a height of L0 cm. 

 The Bermuda plant occasionally sends oul a very long, slender rhizoid 



from one of the lower cells; this has not been Seen in the Jamaica 

 material. 



1. C i rispi i.\ Vickers, 1905, p. 56; L908, p. L9, PL XVI; Collins. 



