1919] Setchell-Gardner : Myxophyceae 27 



It is also closely relatod to D. solitaria very recently described by 

 Collins and Hervey (1917, no. 2155 MS and 1917a, p. 17) from Ber- 

 muda. Both species have the same habit of growth on the host, being 

 mostly solitary instead of being aggregated into dense clusters as are 

 most species of Dermocarpa. D. solitaria, however, is much longer 

 than D. siiffuHa, being np to 75/i, long. 



5. Dermocarpa fucicola Saunders 



Plate 8, fi^s. '), 6 



Cells densely crowded into groups of irregular shape and indefinite 

 size, up to 12 mm. across, of very dark olive green to purplisli violet 

 color, 22-3{V diam., 40-60//. high at maturity, broadly pj^riform to 

 balloon-shaped, narrowing into a stipe-like portion below ; gonidia 

 formed by the simultaneous division of tlie whole protoplast, 4-5ju. 

 diam. 



Growing on many different species of algae. Common along the 

 whole coast from Puget Sound, Washington, to southern California. 



Saunders MS., in Collins, Holden and Setchell, Phyc. Bor.-Amer. 

 (Exsicc), no. 801, Alg. Harriman Exped., 1901, p. 397, pi. 46, figs. 

 4-5; Setchell and Gardner, Alg. N.W. Araer., 1903, p. 181; Collins, 

 Holden and Setchell, Phye. Bor.-Amer. (Exsicc), no. 1251. 



The above description is based upon authentic material taken 

 from our fascicles of Fhycotheca B or eali- Americana, specimens dis- 

 tributed by Saunders under no. 801. It is presumabh' from material 

 of this distribution that Saunders drew his original description of the 

 species. These specimens are just coming into maturity, as shown 

 from the scarcity of the gonidangia. The measurements are based 

 upon the mature cells, that is the gonidangia, very few of which 

 mea.sure 40/x long, the majority being between 50/^ and 60[x long. We 

 express some doubt as to whether the gonidia are formed by simul- 

 taneous or by successive divisions of the protoplast. No indications 

 of successive divisions were seen, all of the gonidia noticed being 

 completely formed. 



('}. Dermocarpa pacifica S. jukI G. 



Plate 3, figs. 22-24 



Cells aggregated into colonies up to 200/Lt diam., varying in shape 

 from nearlj' spherical, broadly ovate or pear-shaped, to narrowlj'' 

 wedge-shaped, 30-45/i, long, 20-35/a diam.; cell walls thick, hyaline, 



