LIST OF FAMILIES, GENERA, AND SPECIES, IN THE THREE COLOUR GROUPS, 
xHi 
CHLOROSPERMS Group.) 
Colour. Varying from bright grass-green to dark-green. In a 
few exceptional cases^ purple and rose-red. 
Fruit. Minute seeds called Zoospores., from having at one 
])eriod a motion as of animal life ; formed of the 
colouring matter {endochrome) in the cells or tubes 
of which the frond is composed; very rarely external. 
Family 20,— Spongy or soft and thread-like. Threads tubular, filled with liquid green 
colouring -matter (endochrome). 
Zoospores in external cases (capsules), or internal. 
CoDiuM ; bursa, adhaerens, amphibium, tomentosum. 
Vaucheria ; siibmarina, marina, velutina. 
Bryopsis ; plumosa, hypnoides. 
Family 21.-ULVACE.ffl , — Soft ; membranaceous ; flat or thread-like ; tubular. 
Composed of colour-cellules laid side by side ; or con- 
taining colour-cells variously arranged. 
Zoospores internal. 
Porphyra; laciniata, vulgaris. 
Bangia ; fusco-purpurea, ciliaris, elegans.^ 
Goniotriohum ; j ceramicola. 
Entbromorpha ; Corniicopise, intestinalis, compressa, Linkiana, erecta, clathrata, 
ramulosa, Hopldrkh, percursa, Balfsii. 
Phycoseris ; J latissima, linza. 
Ulva; lactuca. 
* Of doubtful affinity. See under Fig. 350. 
f Formerly Bangia ceramicola (Fig. 349) ; the change of name was accidentally omitted in 
its proper place. 
X Formerly Ulva latissima (Fig. 342), and U. linza (Fig. 344). This subdivision of the 
Ulvas is scarcely established. The collector can adopt it or let it one, as he pleases. 
Family 22- CONFERVACEiE. — Soft tufts of jointed threads. Joints containing 
liquid colouring matter (endochrome). 
Zoospores internal. 
OcHLOCH^TE ; hystrix. 
Cladophora; Brownii, repens, pellucida, rectangularis, Macallana, Hutchinsite, 
diffusa, nnda, rupestris, lastevirens, flexuosa, gracilis, Balliana, Kudolphiana, 
refracta, albida, lanosa, uncialis, arcta, glaucescens, falcata, Magdalente, 
Gattyse, flavescens, fracta. 
Khizoclontum ; riparium, Casparyi. 
