86 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Gelidiopsis variabilis (Greville) Schmitz 



Schmitz, 1895, p. 148; Feldmann, 1931, p. 156, fig. 2B; Dawson, 

 1944^ p, 225, pi. 70, fig. 1. Gelidium variabile Greville, in J. Agardh, 



1852, p. 468. 



Thalli to 16 cm. high, consisting of numerous remotely branched, 

 terete axes arising from a tangle of loose stolons attached to the sub- 

 stratum by small discs ; erect axes 500-850 /a in diameter, slightly more 

 slender in upper parts, irregularly alternately or subdichotomously 

 branched, mostly at intervals of 4-18 mm., the terminal segments often 

 2-3 cm. long ; apices rounded, without an apical cell ; internal structure 

 consisting of a central medullary core of small cells 10-14 /a in diameter 

 and 15-20 diameters long, surrounded by a layer of medullary cells 15- 

 20 {x. in diameter and about 3-4 diameters long, these merging into a 2-3 

 layered cortex, the outermost of radially flattened but quadrate cells 

 about 8 /A in greatest diameter ; reproduction not observed. 



Type : Holotype is a specimen collected by Wight, probably in the 

 Hooker Herbarium at Kew, England. According to Feldmann, 1931, an 

 isotype is in the Agardh Herbarium, Lund, Sweden. 



Type locality: Coast of western India. 



Mexican distribution: Gulf of Calif. — Drouet & Richards 

 3395, Punta San Pedro, near Guaymas, Dec. ; D. 3505, Ensenada de San 

 Francisco, Sonora, Nov.; D. 7074, Punta Frailes, Mar.; D. 3412, Ca- 

 beza Ballena, Nov. 



Wurdemannia miniata (Lamk. & DC) Feldm. & Hamel 



Feldmann & Hamel, 1934, p. 544, figs. 9-11 ; Dawson, 1944, p. 263 ; 

 Taylor, 1945, p. 151. Fucus miniatus Draparnaud ex Lamarck et De- 

 Candolle, 1815, p. 6. Cigar tina miniata nom. nud. in Lamouroux, 1813, 

 p. 49. Wurdemannia setacea Harvey, 1853, p. 245; B</)rgesen, 1920, p. 

 368, figs. 360-361 ; Taylor, 1928, p. 145, pi. 20, figs. 9-10. 



Thalli arenicolous, densely matted or felted, often mixed with other 

 algae, consisting of numerous branched, loosely interlaced, ascending, 

 wiry filaments from tangled prostrate ones attached by small discs to 

 sand and shell fragments and sometimes to each other; erect filaments 

 1.5-2.5 cm. high, cylindrical or slightly compressed, 150-220 /x in dia- 

 meter, blunt-tipped, without a recognizable apical cell, irregularly and 

 rather remotely branched, tending to be distichous, but not strictly so; 

 internal structure consisting of a medulla of thick-walled elongated cells 

 7-8 jx in diameter, 7-10 diameters long, grading into the cortex whose 

 ellipsoidal cells are smaller in diameter (to 5 /t) and thinner walled; 

 rhizoidal filaments absent ; reproduction not observed. 



