204 Universiiti of Qdifornio Fuhlicafions. [botany 



Tetraspora cylindrica (Wahleul).) Agardh. 



In rapidly tiowiiifj' mouutaiu stream. Silver Bf)w Basin, 

 Juneau, Alaska, W. L. Jepson, Nos. 5200!, 5201!, and in Col- 

 lins, Holden and Setdiell, P. B.-A., No. 908! 



Decidedly firmer in texture than the preceding and provided 

 with a distinct stipe, l)ut it hardlj' seems either necessary or 

 proper to remove it to another genus as Chodat has proposed in 

 creating his Stapfia (1897, p. 9-47). The possession of a solid 

 gelatinous axis is also a character of the proposed genus Stapfia, 

 but hardly characterizes it sufficiently. Nordstedt (1899, p. 267) 

 has discussed the nature of the genus and the identity' of Stapfia 

 cylindrica Chodat and Ulva cylindrica Wahlenb., while Borgesen 

 (1898, p, 135) has described and figured the stipe. 



Tetraspora lubrica var. lacunosa Chauv. 



In small brooks. Near Iliuliuk, Uualaska, Alaska, Tr.A.;S\ 

 and A.A.L., No. 4094! ; Port Renfrew, Vancouver Island, B. C, 

 Butler and Folley, and in Collins, Holden and Setchell, P. B.-A., 

 No. 861 ! 



CoLLiNSiELLA Sctchell and (lardner gen. no v. Tetrasporacearum. 



Fronds globular to irregularly and tuberculately lobed, con- 

 fluent l:)y a thin basal layer, at first solid, later hollow, composed 

 throughout of pear-shaped cells on dichotomously branched, gel- 

 atinous stalks which taper downwards. Chromatophore single, 

 band-shaped, with a single conspicuous pyrenoid. 



The genus, here proposed, is most nearh' related to Oocar- 

 dium, but differs from it in the shape of the cells, in the presence 

 of cells throughout the jelly of the frond, and the shape of the 

 gelatinous stalks of the cells. We take pleasure in dedicating 

 this genus to our friend, Frank Shipley Collins of Maiden, Mass., 

 in recognition of his services to American Algology. 



Collinsiella tuberculata Setchell and Gardner sp. no v. 



Plate 17. 



Forming extended layers of a dark green color and firmly 



gelatinous consistency on stones and pel)bles. Cells piriform, 



12-20 p- !)>■ 9-12 i^-. The l)ranching proceeds from division 



in two directions at right angles to one another and to the sur- 



