

I hi; ai.o \i. OF BERM1 DA. 145 



Protoplasl subcylindrical in the lower cells, subspherical in the upper, 

 marked with a pattern of delicate, Longitudinal bands, seldom anasto- 

 mosing or extending the length of the cell, usually separated bj spaces 

 of about their own width. Tetrasporangia ovoid, about 50 X 35/*, 

 excluding wall about <'>m thick. 14 at a node, cruciate, sometimes 



darly, sometime- decussately; when singly at a node they form an 

 external longitudinal -eric-; when more than one, they are irregularly 

 placed about the node; about half of the sporangium projecting 

 beyond the cortication. On Padina variegata, Gibbet [sland, Jan. 

 16, 1913, Hervey, type in Collins herbarium, Xo. 7418a; also on 

 Galaxaura, Gravelly Hay, April, on various algae, Hamilton Harbor, 

 Dee.. Collins. 



In habit like the following species, C. transversale, but a larger plant, 

 and distinct by the division and position of the tetraspores, and the 

 character of the cortication. Only tripartite tetraspores have been 

 recorded for any of the numerous species of Cercimium, bur as other 

 characters agree, it does not seem desirable to remove it from the 

 genus. 



3. C. transversale sp. now; P. B.-A., Xo. 2049. Minuta, ad 

 alias algas saxaque repens; filamento prostrato 60-90 n diam., cel- 

 lulis sesqui-8 diam. longis, cylindricis vel ad nodos leviter contractus, 

 rhizoidis unicellularibus, incoloratis affixis, ad nodos singulis pluri- 

 busve ortis; filamentis erectis passim ad nodos evolutis; filament] 

 prostrati apice assurgente, in filamentum erectum transformato; 

 ramulis penultimis circa 60 n diam.; filamentorum erectorum cel- 

 lulis ad 2 diam. longis, non amplius; prope apicern diametrum 

 non aequantibus; filamentis erectis repetite dichotomis; cellulis 

 inferioribus cylindricis, superioribus adparenter brevissime clavatis, 

 causa corticationis ad apicern; corticatione a parte corticata distinctis- 

 sima, super seriem cellularum transverse elongatarum series 2 vel 

 3 cellularum rotundo-angulatarum irregulariter positarum gerente. 

 Protoplasms uniformiter granulosum vel striis tenuibus, parallelis, 

 longitudinalibus notatum per totam longitudinem cellulae; in 

 cellulis inferioribus eylindrica, in superioribus subsphaerica. Cysto- 

 carpio evoluto ad apicern segment] 2 5-cellularis, cellulis supra in- 

 crassatis, cellula summa cellulam imam duplo plusve majore, non- 

 nullos ramos paucicellulares involucrales, cystocarpios 1 2 Lncludentes 



ate; cystocarpiis adparenter terminalibus, atque axi plerumque 

 ultra cystocarpios et mvolucrem protenso, ex cellula- paucas constante, 

 cellula basali 2-3 diam. longa, ceteris, ut cellulis involucri, vix 1 diam. 

 Tetrasporangiis tripartitis, ad 60 /i diam.. membrana 8p crassa non 



