l6 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Frond with midrib, nerves and usually conspicuous veins. 



Color a pale violet through bright violet red to purple violet ; 

 thin and papery in texture; sori forming narrow flabellate lines 

 on upper divisions of frond, or linear patches along margin, 

 or rounded patches borne on the crispate margin or on mar- 

 ginal proliferations, or appearing in both lines and patches. 



N. violaceuin (39). 



Color a bright red to blackish red ; firm and leathery in texture ; 



sori forming wide flabellate lines on upper divisions of frond, 



or rounded patches on marginal or surface proliferations, or 



appearing in both lines and patches. . . N. ritprechiianum (34). 



Frond without midrib, but provided with network of conspicuous nerves and 



veins .A^. latissimum (16). 



Frond without midrib, nerves, or conspicuous veins, but provided with 

 microscopic veins. 

 Frond ample, erect, membranous below, branching above; sori form- 

 ing elliptical patches scattered over surface of frond. 



A^. fryeanum (22). 

 Frond erect, branching throughout, apices of ultimate branches re- 

 curved or hooked N. nncinatiun (26). 



Frond minute, creeping, ultimate lobes becoming free ; sori forming 

 rounded patches on free lobes; on Corallina chilensis (and 



other algse ?) N. corallinarum (24). 



Frond destitute of veins, membranous ; sori forming elliptical patches scat- 

 tered over surface of frond -A^. spectabile (21). 



N. latissimum J. Ag. 



Epicrisis Floridearum, Contin. Spec. Gen. et Ord. Alg., 1876, p. 464. 



Hymenena latissima Harvey, W. H.. Proc. Linn. Soc, (Botany) Vol. VI, 

 1862, p. 170. 



N. latissimum Agardh, J. G., Bidrag Florid. Sys., 1871, p. 49. Farlow, 

 W. G., Proc. Amer. Acad. Arts and Sci., Vol. X, 1875, P- 3^5; Report 

 U. S. Fish Comm. for 1875, p. 695, 1876. 



N. areolatum Eaton, D. C, Farlow, 1. c, p. 695. 



N. latissimum Agardh, J. G., Epicrisis Florid., Contin. Spec. Gen. et Ord. 

 Alg., 1876, pp. 464 and 699. Farlow, W. G., Proc. Amer. Acad. Arts 

 and Sci., Vol. XII, 1877, p. 238. Farlow, W. G., Anderson, C. L., 

 and Eaton, D. C, Algse Amer. -Bor. Exsiccatae, No. 68, 1878. Hervey, 

 A. B., Sea Mosses, i88r, p. 175. Anderson, C. L., Zoe, Vol. II, 1891, 

 p. 224. Howe, M. A., Erythea, Vol. I, 1S93, p. 68. McClatchie, A. 

 J., Proc. So. Cal. Acad. Sci., Vol. I, 1897, p. 358. Nott, C. P., in 

 Phyc. Bor. -Amer., Collins, F. S., Holden, I., and Setchell, W. A., 

 Fasc. VII; No. 335, 1897. Tilden, J. E., American Algje, Century III, 

 No. 212, 1898. Agardh, J. G., Contin. Spec. Gen. et Ord. Alg., Vol. 

 Ill, Pt. 3, 1898, p. 83. 



N. macroglossmn Agardh, J. G., 1. c, p. 84. 



