xliv LIST OF TAMILIES, GENERA, AND SPECIES, IN THE THUEE COLOUR GROUPS, 



CHLOEOSPEEMS.— ((?r^m Group,) 



Varying from bright grass-green to dark-green. In a few 



exceptional cases, purple and rose-red. 

 Minute seeds called Zooi^pores^ from having at one period 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 tliread-Uhe. Threads tubular^ filled with liquid 

 green colouring -matter (endochrome). 

 Zoospores in external cases (capsules), or internal. 



Coditjm; bursa, adhairens, amphibiura, tomentosum. 

 Vaucheria; submarina, marina, velutina. 

 Brtopsis; plumosa, hypnoides. 



Family 21. — ULVACEj^. — Soft; membranaceous; fiat or thread-lilce ; tubular. 



Composed of col our -cellules laid side by side; or 

 containing colour-cells variously arranged. 



Zoospores i7iternal. 



PoRPnYRA; laciniata, vulgaris. 



Bangia; fusco-purpurea, ciliaris, elegans.* 



GoNiOTRiCHTJM;t ceramieola. 



Enteromorpha; Cornucopise, intestirialis, compressa, Linkiana, erecta, 



clathrata, ramulosa, Hopkirkii, percursa, Ealfsii. 

 Phtcoseris;:!: latissima, linza. 

 TJlya; laetuca. 



* Of doubtful affinity. See under Fig. 350. 



f Formerly Bangia ceramieola (Fig. 349); the change of name was 

 accidentally omitted in its proper place. 



+ Formerly Ulva latissima (Fig. 342), and TJ. linza (Fig. 344). This sub- 

 division of the TJlvas is scarcely established. The collector can 

 adopt it or let it alone, as he pleases. 



Family 22.— CONFEHVACE^.— ,$'0/^ tufts of jointed threads. Joints con- 

 taining liquid colouring matter (endochrome). 



Zoospores internal. 



OcHLOCHiETE; hystrix. 



Cladophora; Brownii, repens, pellueida, rectangularis, Macallana, Hutchinsisa, 

 dilfusa, nuda, rupestris, leetevirens, flexuosa, gracibs, Balliana, liudolphiana, 

 rei'racta, albida, lanosa, uncialis, arcta, glaucescens, falcata, Magdalense, 

 Gattyse, flavescens, fracta. 



Ehizoclonitjm; riparium, Casparyi. 



Colour, 

 Fruit, 



