lo Charles E. Bessey 



Family 13. Rhizophyllidaceae. Plants terete or compressed, 

 sometimes articulate-constricted, sometimes creeping; structure 

 mostly filamentous. Chondrococcus, Rhizophyllis. (Pf. I, 2, 

 527). 



Family 14. Squamariaceae. Plants usually minute, foliaceous, 

 or crustiform, attached by rhizoids on their lower surface, usually 

 encrusted with lime. Peyssonellia. (Pf. I, 2, 532.) 



Family 15. Corallinaceae. Corallines. Plants from filamen- 

 tous, more or less branched (and then jointed) to foliaceous or 

 crustaceous, always encrusted with lime. Corallina, Melohesia. 

 (Pf. I, 2, 537.) 



Order Ceramiales. " Sea Mosses." Filiform to foliaceous 

 plants : sporophores produced by nearby auxiliary cells. Here 

 are to be found the most beautiful forms of the Red Seaweeds. 



Family 16. Delessariaceae. Plants foliaceous, often with mid- 

 ribs, and regular netted patterns. Here are some of the most 

 beautiful of the red seaweeds. Nitophyllum, Grinnellia, Deles- 

 saria. (Pf. I, 2, 406.) 



Family 17. Bonnemaisoniaceae. Plants consisting of long, 

 slender main stems covered with filamentous branches. Bonne- 

 maisonia. (Pf. I, 2, 417.) 



Family 18. Rhodomelaceae. Plants cylindrical or flattened, 

 mostly much branched, often foliaceous ; structure mostly paren- 

 chymatous and polysiphonous. Polysiphonia, Rhodomela, Dasya. 

 (Pf.1,2,421.) 



Family 19. Ceramiaceae. Plants filiform, sometimes corti- 

 cated, mostly laterally branched, complanate. Lejolisia, Calli- 

 thamnion, Ptilota, Ceramium. (Pf. I, 2, 481.) 



Order Gigartinales. Soft Red Seaweeds. Parenchymatous 

 plants ; the fertilized oogone conjugates with its nearby auxiliary 

 call ; the latter then gives rise to the sporophores which branch 

 copiously in the surrounding tissues of the plant body. 



Family 20. Acrotylaceae. Plants parenchymatous, ' erect, 

 branching, flattish ; tetraspores zonate. Acrotylus. (Pf. I, 2, 

 TxSO.) 



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