PLATE VII. 
Fig. 26.—M. occidentalis catalinensis, subsp. noy. Portion of a branch 
showing finger-like processes on scutum (sc.), and bifid spines (¢. sp.). * 50. 
Fig. 27.—M. occidentalis catalinensis. Lateral view of a zoecium show- 
ing root chamber (r ch.) and downward extending root fibre (7.). 
Fig. 28.—Menipea erecta Robertson. Habit sketch, natural size. 
Fig. 29.—M. erecta. Enlarged portion of a colony from Kadiak show- 
ing lateral avicularia (lat. av.), frontal avicularia (fr. av.), and spines 
(sp.). X 30. 
Fig. 30.—M. erecta. Enlarged portion of a colony from Sitka showing 
absence of lateral avicularia (lat. av.); showing also rootlet (7.) springing 
directly from zoccial wall. X 30. 
Fig. 31.—WM. erecta. Enlarged portion of colony from San Juan showing 
absence of spines. 30. 
Fig. 32.—Menipea pribilofi, sp. nov. Habit sketch, natural size. 
Fig. 33.—M. pribilofi. Occial internode (0e.). X 30. 
[304] 
