XXXViii LIST OP FAMILIES, GENERA, AND SPECIES, IN THE THREE COLOUR GROUPS, 
IlHODOSPERMS-(i?eJ Group). 
Colour. Varying from pink to crimson, or dark, reddish purple. 
Fruit. Of two kinds — 1. Simple seeds, properly called Spores. 2. Four- 
parted seeds, called Tetraspores ; external ; or sunk, or wholly 
or partially immersed in the frond. 
Family 'y.-mOBOWELAG^M-Soft; slender ; thread-like ; or membranaceous ; 
flat. 
1. Spores in external cases (capsules), having an 
opening at top. 
2. Tetraspores immersed. 
Odonthalia ; dentata. 
Chondria;* dasyphylla, tenuissima. 
Rhodomela; lycopodiodes, subfusca. 
Rytiphl^a ; pinastroides, complanata, thuyoides, fruticulosa. 
Polysiphonia ; urceolata, formosa, pulvinata, fibrata, spinulosa, Ricbardsoni, 
Griffitbsiana, elongella, elongata, violacea, Carmichaeliana, fibrillosa, Brodiaei, 
variegata, obscura, simulans, nigrescens, affinis, subiilifera, atro-rubescens, 
furcellata, fastigiata, parasitica, byssoides. 
Bostrychia ; scorpioides. 
Dasya ; coccinea, ocellata, arbuscula, venusta, Cattloviie ? f, punicea.J 
* 'F oxmQvly Laurencia dasyphylla (Fig. l-ti), and L. tenuissima (Fig. 148). 
f See Appendix of New Species. J See Appendix of New Species. 
Family S.-LAURENCIACEiE , — Soft and thread-like ; fleshy or gelatinous. 
1. Spores in external closed cases (capsules). 
2. Tetraspores immersed. 
Bonnemaisonia ; asparagoides. 
Laurencia ; pinnatifida, coespitosa, obtusa. 
Lomentaria;* ovalis, kaliformis, reflexa. 
Champia ; I parvula. 
=*< Formerly Chylocladia ovalis (Fig. 145); C. A;a/(/bmw (Figs. 146, 151), and C. reflexa 
(Fig. 138). 
+ Formerly Chylocladia parvula (Fig. 153). 
Family 9.-WEANGELIACEJE.-So/if, thread-like ; more or less visibly clothed with 
jointed branchletecn^. 
1 . Spores in masses j on external, hair-like, jointed 
threads. 
2. Tetraspores external. 
Wrangelia ; multifida. 
Naccaria ; Wiggii, bypnoides.'*' 
* See Appendix of New Species. 
