I9i-i] Setchell: The Scinaia Assemblage 121 



near San Diego, California, on June 30, 1898, by Mrs. .M. S. Snyder, 

 to whom tlie species is dedicated in token of appreciation of her 

 interest, industry, and generosity in collecting, studying, and distribut- 

 ing marine algae of Southern California. Specimens collected at La 

 Jolla by Mrs. Snyder and by M. B. Nichols and at San Pedro by INIrs. 

 H. D. Johnston and Dr. N. L. Gardner have also been used for study. 

 Pseudoscinaia Snyderae is closely allied to the next species below 

 ])()tli in liabit and structure. It is, however, a more robust i)lant with 

 smaller cystocarps and more radially elongated utricles. The vegeta- 

 tive structure in both species is distinctly close to that of Scinaia 

 furcellata, but the cystocarps are not those of Scinaia furcellata but 

 rather those of Galaxaura. It is, in turn, entirely free from calcifica- 

 tion and has colorless utricles in the epidermis. It is of a certain 

 peculiar appearance due to the considerable number of dichotomies 

 and the uniform diameter of base and apex in its branches. It is to 

 be expected from Santa Barbara to La Paz, if arguments may be drawn 

 from the distribution of other members of the Scinaia assemblage. 



Pseudoscinaia australis sj). nov. 



Plate 16, fig. 62. 



Scinaia furcellata J. Bracebridge Wilson, Proc. Eoy. Soc. Victoria, new ser., vol. 

 4, p. 173, 1892? (not Ulva furcellata Turner). 



Plant pink purple, 9-10 em. high, about 10 times dichotomous, 

 .slender. 1 mm. in diameter (dried); axils broad; axis obscure but 

 often visible f dried) ; cystocarps scattered, minute, barely visible; 

 — axial strand slender of coarser and finer filaments nearly i)arallel, 

 loo.se; epidermis of colorless cells (utricles) with frequent scattered 

 slender colored cells; utricles oblong to square in radial section, 20- 

 21/x (T) by 1.3-21/x (R), convex at the outer end presenting an a])pear- 

 ance of irregular, loose, IJunt polygons in surface view (T) ; hypo- 

 dermis of two layers of globular cells. 4-5/a in diameter ; corticating 

 layer thin and loose; antheridia scattered, mostly solitary; cystocarps 

 globular or flattened globular, abruptly uai'rowed into a slender 

 carpostome. 150-175/i, (T) by 130-150/x (R, exclusive of carpo.stome) ; 

 gonimoblasts spread out over the basal half to two-thirds of the cysto- 

 earpic cavity and abjointing successively pyriform spores in several 

 groups; paraphyses wanting: peridci-m pseudoparenchymatous. of 

 5-6 layers. 



Of Pseudoscinaia australis there is itily a single specimen, the type. 

 which is No. 74793 of the Herbarium of the University of California. 

 It was collected ]i\- J. Bracebridge Wilson on Januarv 17, 1893. at 



