224 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



Family Elachistaceae 



Genus GONODIA Nieuwiand 

 Gonodia Johnstonii S. & G. 



Setch. & Gard., 1924, p. 722, pi. 17, figs. 46, 47; 1925, p. 506. 



J. lib, growing on Sargassum lapazeanum, San Marcos Island, June. 

 Not again detected. 



Gonodia Marchantae S. & G. 



Setch. & Gard., 1924, p. 723, pi. 17, fig. 48; 1925, p. 506. 



M. 22a, growing on the fronds of Sargassum horridum. Eureka, May. 

 Not again detected. 



According to Setchell and Gardner, Gonodia Marchantae differs 

 from G. Johnstonii in the character of the basal penetrating portion, the 

 former having few narrow filaments and the latter having a dense, copi- 

 ous, pseudoparenchymatous base. Two or three cells in the lower part of 

 the free filaments are usually asymmetrical in G. Marchantae and not so 

 in G. Johnstonii. Neither species has hairs or any indication of having had 

 them, a prominent character as figures by Thuret and Bornet in Etudes 

 Phyc. pi. 7, figs. 2-6, for Elachista pulvinata, and mentioned by Yendo 

 as 'paraphysibus paucioribus' in Myriactis Sargassi (Nov. Alg. Japon., 

 1920, p. 3). G. Marchantae is close to G. pulvinata in character of the 

 basal penetrating portion. G. Johnstonii in general resembles G. monili- 

 formis but is much smaller throughout. 



Family Sphacelariaceae 



Genus SPHAGELARIA Lyngbye 

 Sphacelaria furcigera Kiitz. 



Kutzing, Tab. Phyc. V, p. 27, pi. 90; Setch. k Gard., 1924, p. 724, pi. 

 19, fig. 58. 



Gametophytic specimens were detected on Marchant's collections of 

 Sargassum (22) and provisionally identified by Setchell and Gardner as 

 Sphacelaria furcigera. Propagulum-bearing specimens, which seem satis- 

 factorily to correspond to those of this species as figured by Kutzing, have 

 recently been observed growing on Sargassum. 



D. 686b, growing on old, lower stems of Sargassum Camouii, Tiburon 

 Island, July. 



