404 University of California Publications in Botany [Vol.6 



Gigartinales. " This discoverjy makes Harveyella a step farther away 

 in its relationship to Cumagloia Andersonii than it formerly seemed 

 to be. 



Summarizing- the characters of the cystocarps of NemaUon, Cuma- 

 gloia, Dermonemn and Harveyella we may arrange these genera 

 in the following series. Nenialion possesses the simplest form of 

 cystoearp, with very short gonimoblasts arising from the fertilized 

 carpogonium after its division as exemplified by N. luhricuni; or with 

 longer gonimoblasts, more profusely branched, but still compact, aris- 

 ing in the same manner, as exemplified by N. Schrammi. Cumagloia 

 has the gonimoblasts profusely branched, vn\\\ the main branches 

 mostly extending horizontally, intermingling with the cortical fila- 

 ments, and giving rise to ni^merous branches growing obliquely and 

 perpendicularly upward ; but the gonimoblasts arise directly from the 

 fertilized carpogonium. Dermonema has a more extensive system of 

 gonimoblasts than Cumagloia, but of the same general type, arising 

 however, as do those of NemaUon. Finally, Harveyella has a profuse 

 mass of gonimoblastic filaments intermingling with the sterile fila- 

 ments similar to the two preceding genera, but the gonimoblasts arise 

 from the auxiliary cell after its fusion with the carpogonium. 



In conclusion I wish to acknowledge my grateful appreciation for 

 the mam^ helpful suggestions and the discriminating criticisms of 

 Professor W. A. Setchell, who also rendered the Latin diagnoses. 



LITEEATUEE CITED 

 Agardh, J. G. 



1847. Nya alger fraii Mexico. Ofv. k. Sv. Vet. Akad. Forli. 

 1889. Species Sargassorum Australiae. K. Sv. Vet. Akad. Haiidl., vol. 23, 

 no. 3. 



Anderson, O. L. 



1891. List of California marine algae with notes. Zoe, vol. 2, p. 221. 

 B0RGESEN, F. 



1902. The marine algae of the Faeroes. Copenhagen. 



1915. The marine algae of the Danish West Indies, vol. 2, Ehodophyeeae. 

 Copenhagen, 



CoHN, Ferdinand. 



1872. Ueber parasitische Algen. Beitriige zur Biologie der Pflanzen, vol. 1, 

 p. 87. 



Collins, F. S. 



1909. Green algae of North America. Tufts College Studies, Scientific Series, 

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