204 University of California Publications. [botany 



Tetraspora cylindrica (Wahlenb.) Agardh. 



Iu rapidly flowing mountain stream. Silver Bow Basin, 

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

 lins, Hidden and Setchell, P. B.-A., No. 908! 



Decidedly firmer in texture than the preceding and provided 

 with a distinct stipe, but it hardly seems either necessary or 

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

 creating his Stapfia (1897, p. 947). 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 Viva cylindrica Wahlenb., while Borgesen 

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



Tetraspora lubrica var. lacunosa Chauv. 



In small brooks. Near Iliuliuk, Unalaska, Alaska, W.A.8. 

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

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

 No. 861! 



Collinsiella Setchell and Gardner gen. no v. Tetrasporaeearum. 



Fronds globular to irregularly and tuberculately lobed, con- 

 fluent by 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 nearly related to Oocar- 

 diiim, lint 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. nov. 



Plate 17. 



Forming extended layers of a dark green color and firmly 



gelatinous consistency on stones and pebbles. Cells piriform, 



12-20 p- by 9-12 /*. The branching proceeds from division 



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



