MARINE ALG OF BEAUFORT, N. C. 535 
jf. Frond with ultimate branchlets club shaped and terminated by brushlike tufts of 
haits,.o floats; present <isrtish amisrachevblgitabeptiooie! dav lene thy. tom als SPOROCHNUS (p. 448). 
aaaa. Frond terete throughout, variously branched. .)...... 05.6.5. ce atl cee es g- 
g. Frond forming a hollow tube, constricted and twisted at irregular intervals, about 
2 mm. in diameter, dichotomously branched...-.-.-................ROSENVINGEA (p. 443). 
gg. Frond not conspicuously tubular, about r mm. in diameter, irregularly branched, 
spongy texture........ paeereh bowers faetyr aOR Wis Ce yore mechs tse ORT CASTAGNEA (p. 446). 
ggg. Frond solid or nearly so, less than 1 mm. in diameter, dichotomously 
branched. . meer ACIS EOEIAARIEIO (etre 4 9 «| . .STILOPHORA (p. 448). 
aaaaa. Frond more or as ‘Abtteneds Peale or - branelied da depos tos. o.Attoe Gs Haire Briar. we 6c. h. 
h. Frond consisting of one or more elongated, leaflike lobes. . sahdentin . PETALONIA (p. 443). 
ms Frond fan shaped throughout or at least in the terminal ae ois So: ReBos 
. Frond or segments bearing concentric zones aes with the anteaty margins, yy anical 
margins inrolled.. sobre fajato ajnd west. 4 .PADINA (p. 455). 
. Frond or segments shearing radial markings Seen eid ‘the base o the apical 
margins, apical margins not inrolled.. acca a sbteeprsttacd: Sint ailer .. ZONARIA (p. 454). 
hhh. Fronddichotomouskybranched: .c.jjsegi0d-i2 shell oy ln ee. de.ouiet ated. hs... j- 
j. Frond tough, leathery, tot with bladderlike floats at intervals in frond 
asad beunlse ..Fucus (p. 450). 
I. Frond. educa. no 9 floats present... eistapepehasa = ates spats © Spun curse A SEISY DS PRERLOAL AA oe oi k. 
ie pUbiskinchesrsicl ra lamp res rt a aches a0) aic) 2, 35575 yes Bassous Seeks 'sualsqaya,cinjesd as oi SRE DICTYOPTERIS (p. coe 
be. No midrib presemtya sii. accede sipie.spsensie bie beanssiajeqe BUA OSes YEN RTS: PASE oS l, 
l, Frond growing in length by group of initial cells, edges more or less serrate or 
GTI ALE ebbti Mites acta ara) austen cick vwsieerusma bi seme eel levee’ SPATOGLOSSUM (p. 458). 
i], Frond growing in length by single wales cell, edges with occasional prolifer- 
ations but not serrate or dentate. pS dee Eee th .Dicryota (p. 460). 
AAAA,. Color various shades of red, pink, puna, Res Fieahe eleae or green 
(if green, structure apparently cellular, not entirely composed of interwoven 
filaments), sometimes white from incrustations of lime; filamentous or forming 
sheets or complex structures of various shapes; some forms epiphytic, some minute, 
parasitic on other alge; usually attached...........................IV. RHODOPHYCEZ, 
a. Ftond notinesusted) with#imes js tesgosdtacvaitisdslsiaati orasiinl bilo. MAIS. Sases woe ens deta one b. 
6. Frond minute, parasitic, forming swollen knotson Gymnogongrus griffithsia. ACTINOCOCCUS (p. 477). 
bb. Frond jfilamentotisyc: 4 hiseaqes sarge prayed del) et Tia oth ermtee Yoh. gi. d loetert. anne. as «w+ «ls c. 
c. Filaments creeping, closely adherent, forming irregular patches..... ERYTHROCLADIA (p. 466). 
cc, Hilaments more Or less! erect fi oo2 5 = cte e.eas <robsan; = bieys oishs ovate SIMS Rho WESLINY MORI DIATE cos oos.e 5 dle d, 
d, Filaments regularly dichotomous, tips usually incurved................ CERAMIUM (p. 513). 
dd. Hilaments not, repularly,dichotomous,,::.25.-\24:o:sfeanes eteliemend ehatlad aphiten secs ees e. 
e. Filaments consisting throughout, or for the most part, of a single row of cells; 
BBG eOMOranched yey tte artis. rte acyaicie, oie ave » cocks SBI UR SP IETROUIN eon dinyjnte' “aus ele af 
f, Filaments sparse, scattered or few occurring in small tufts on other alge; 
almost microscopic in size; cen branching by method known as ‘“‘false 
branching’’..... wet ..GONIOTRICHUM (p. 465). 
jf. Filaments composed of Shawete or Seeerel- Pao cells... . GRIFFITHSIA (p. 511). 
Sif. Filaments densely branched, forming erect, fairly Seeaeies tufts on rocks 
or plants... nis selec «em MTA, *RA TTA nt CALLITHAMNION (Pp, 525). 
Siff. Filaments Seominee in selivdivida Aoths stenceap dole hve oie Seats Acrochetium infestans (p. 473). 
Uifff. Filaments forming more or less dense mats over other algez............ 0.00. e cece g: 
g. Mat very fine, velvety, often inconspicuous except for the reddish tinge 
given the host; filaments minute.........5..0..0c40ceeeeeus ACROCHATIUM (p. ick 
Pare Nbat coatser, CONSPICUOUS, 5, Higgs yateeTaSHeae Tatas EMER T > Mhz dee oe sane ers h. 
kh. Individual filaments easily discernible, rather coarse; mat dark red, 
rather loose ......... s+ sessss....HRYTHROTRICHIA (p. 466). 
hh. Individual Glamnari, sasicelsy iditsecenstaley rather eae velvety; mat 
Briphteted, Cense. <5 yc: 00:50 05.0 4:0 Tee Gls Reel le SPERMOTHAMNION (p. 510). 
