440 University of California Puhlioations in Botany [Vol.6 



maturity, and when mounted in glycerine and acetic acid, change 

 to purple. The contents of the whole gonidangium change into 

 gonidia by simultaneous division. 



Dermocarpa sufFulta Setchell et Gardner sp. nov. 



Plate 36, fig. 9 



Cellulis solitariis aut in coloniis parvis laxe aggregatis, ovoideis, 

 pyriformibus aut aliquando stipitatis, 17-20jit altis, in parte crassiore 

 10-14/A diam. ; contentu laete caeruleo-viridi ; parietibus cellularum 

 hyalinis, homogeneis; gonidangiis e parte superiore cellulae formatis, 

 parte infera ut pedicello sterili persistente; gonidiis 8-12 in goni- 

 dangio, 4— 6ju, diam. 



Cells solitary or loosely associated into small groups, ovoid, pear- 

 shaped or sometimes stipitate, 17-20/x long, 10-14/a diam. at the larger 

 end; contents bright blue-green; cell wall hyaline; homogeneous; 

 gonidangia formed from the upper part of the cell, leaving a cone- 

 shaped, sterile, basal portion; gonidia 8-12 in a gonidangium, 4-6^ 

 diam. 



Growing on Rhodochorton Rothii near high-tide limit in shaded 

 places on rock. Moss Beach, San Mateo County, California. 



These plants were found growing in moderate abundance in com- 

 pany with Dermocarpa hemisphaeriea and with Chlorogloea conferta 

 described elsewhere in this paper. Of all the known species it seems 

 most closely related to Dermocarpa Leihleiniae (Reinsch) Born, and 

 Thur. It differs from that species in being narrower in general, in 

 having fewer and larger gonidia, and in having a larger part of the 

 cell changed into a gonidangium. Nearly half of D. Leihleiniae 

 remains sterile. It is also closely related to D. solitaria very recently 

 described by Collins and Hervey (1917, no. 2155 ms. and 1917a, p. 17) 

 from Bermuda. Both species have the same habit of growth on the 

 host, being mostly solitary instead of being aggregated into dense 

 clusters as most species of Dermocarpa are, D. solitaria is much 

 longer than D. suffulia being up to 75/* long. 



Dermocarpa sphaeroidea Setchell et Gardner sp. nov. 



Plate 36, fig. 7 



Cellulis sphaeroideis aut lente obovatis, sub compressione parvo 

 angularibus, solitariis, aut vulgo in coloniis parvulis aggregatis, ad 

 25/i, diam, ; parietibus cellularum hyalinis, homogeneis, tenuibus, 1.5/^ 

 crassis ; contentu cellularum maturitate dilute caeruleo-viridi, subtili- 

 ter granulato; gonidangiis 18-25/i, diam., contentu totaliter in gonidia 

 partito. 



