126 I] UNA \\D 111 i;\ l Y. 



1. H.8ECUNDA Ag. Falkenbcrg, 1901, p. 307, PI. Ill, figs. 10-12; 



P. P..-A.. So, -'(Mi; Hutekinna secunda Agardh, 1824, p. 149; Poly- 

 siphonia pecten-vmeria \"ar. ^ Harvey, L853, p. 46, II. XVI. I >. On 

 reef. Ely's Harbor, Aug., Collins. In this material theerecl branches 

 arc often abortive, and the regularity of position <>t' branches charac- 

 teristic of the species i- obscured. 



2. II. ii .m.i.i.v Ag. Nageli, L846, PI. \ II. Bg. 2; P. B.-A., No. 

 1943; Hutckinsia teneUa Agardh, L828, p. 105. On rock-, corallines 

 and other algae, Harrington Sound, Bailey's Bay, Gibbet Island, 

 Jan., Smith's Hay, Feb., Nov., Harris Hay, April, Tucker's Town, 



. Hervey. 

 II. PECTEN-VENERI8 Ihirv.i Falkenberg, 1901, p. 315; Polyti- 



phonia pecten-venerti Harvey, l s ">-'i. p. 46, PL XVI. C. An 

 Gelidiopsis, Harris Bay, April, Hervey. A delicate and attractive 

 the graceful recurving of the branches easily distinguishes it. 



Lophosiphoxia Falkenberg. 



1. Pericentral cells 10-16. 3. L. ol- 



1. Pericentral cells 4. 2. 



2. Basal filament attached to substratum by filiform rhizoids, with or 

 without disks. 1. L. bermudensis. 



2. Basal filaments penetrating the host by rhizoids much inflated below. 



2. L. Saccorhisa. 



1. L. bermudensis sp. now; Cellulis pericentralibus 4, interdum 

 ."> aut 6; filainentis prostratis 100-110 /i diam., cellulis 1-2 diam. 

 longis; filainentis erectis uumerosis, ad (>0 segmentis longis, 60-80 u 

 diam. a basi ad prope apicem; cellulis 1J-2 diam. longis, interdum 

 solummodo j diam.; ran lis plus minusve ramosis, aliquando densissime; 

 ramis brevibus. Antheridiis conicocylindricis, 160 200m X 1 () 50 Mi 

 ad apicibus ramorum aggregatis; cystocarpiis subglobosis, lateraliter 

 sessilibus, vel ad pedicellum perbreve, circa 250 u diam.; tetraspor- 

 angiia circa 80 u diam.. 2 5 in seriem rectilineam, in ramulis subin- 

 crassatis, saepecurvis. Plate III, figs. 18-21. 



Pericentral cells 1, occasionally 5 or 6; prostrate filaments 100—1 10 \x 

 diam., cells L-2 diam. long; civet filaments numerous, up to 60 ceils 

 long, 60 M) /J. diam. from base to near apex, cells lj-i 2 diam. l< 

 occasionally only \ diam.; more or less branched, sometimes quite 

 densely, branches short. Antheridia conical-cylindric, 160 200 X 

 l<> 50 /x, clustered at apices of branches; cystocarps subglob 



