260 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



The several Gulf specimens, particularly D. 692, are similar to ex- 

 amples of this species known from the coast of California. They are fre- 

 quently somewhat more flattened in the upper parts, but, on the whole, 

 seem quite properly to belong here. Agreement with European specimens 

 likewise is sufficiently close that they may be placed together to further 

 extend the already wide distribution of Geltdium crinale. 



D. 692, 702, lower littoral. Turner's Island, July; D. 322a, on shore 

 at Gonzaga Bay, Jan. 



Gelidium microphysa S. & G. 



Setch. & Gard., 1930, p. 151, pi. 9, f^g. 31. 



This outstanding small species was described from Guadalupe Island, 

 Lower California, and until now has been known only from the type 

 specimen. A comparison of the cross sections of the frond of the type with 

 that of the present specimens shows that they are undoubtedly identical. 

 This is the only species on our Pacific coast which possesses interlacing 

 rhizoidal filaments in the cortex and medulla instead of straight ones. In 

 other species a cross section severs these filaments at right angles, while 

 in G. microphysa they are found running in all directions. 



D. 726, found growing on lower littoral rocks. Turner's Island, July. 



Gelidium decompositum S. & G. 



Setch. & Gard., 1924, p. 743, pi. 71. 



J. 23, on rocks in lower littoral, San Francisquito Bay, June. Not 

 collected since. 



Gelidium decompositum is said to differ chiefly from G. Johnstonii, 

 with which it is closely related, in the greater irregularity of the length of 

 the pinnae, which are mostly very decidedly crowded together and stand 

 more nearly perpendicular to the parts from which they arise. The plants 

 also are smaller in all of their dimensions. The cells of the subcortex, and 

 especially the cells of the medulla, are decidedly larger and thicker walled. 



Gelidium Johnstonii S. & G. 



Setch. & Gard., 1924, p. 742, pis. 46a, 72, 73. 



This is the largest and most abundant species in the Gulf, and, from 

 collections made thus far, seems to be a spring annual. The material col- 

 lected in January and February is very largely young, or at least im- 



