LIST OF FAMILIES, GENERA, AND SPECIES, ETC. 
XXXVll 
Family 4.— DICTYOTACE^ , — Soft ; membranaceous; flat, or thread-shaped. 
Spores spots or lines on the surface. 
Haliseris ; polypodioides. 
Padina ; Pavonia. 
ZoNARiA ; collaris, parvula. 
CuTLERiA ; multifida. 
Taonia; atornaria. 
Dictyota ; dichotoma. 
Stilophora ; rhizodes, Lyngbysei. 
Dictyosiphon ; foeniculaceiis. 
Striaria ; attenuata. 
Wyattia;* pusilla, Laminarias. 
Asperococcus ; compressus, Turneri, echinatus. 
Punctaria ; latifolia, plantaginea, tennissima. 
* Formerly Litosiphon pusillus (Fig. 52), and L. Laminaria (Fig. 53). 
Family 5.-CH0RDARIACEiE , — Gelatinous ; of various habits. Thread-shaped ; 
tuber-like, or incrustations. 
Spores on threads concealed in the frond. 
Chorda ; filum, loraentaria. 
Chordaria; flagelliformis ; divaricata. 
Mesogloia ; vermicularis, Griffithsiana, virescens. 
Leathesia ; tuberiformis, Berkeleyi, crispa.* 
Ralfsia ; verrucosa. 
Myrionema ; strangulans, Leclancberii, punctiforme, clavatum. 
Elachista ; fucicola, flaccida, curta, stellulata, scutulata, pulvinata, velutina, 
Grevillei,*' Hay deni. ^ 
* See Appendix of New Species. 
Family 6.-ECT0CAIlPACEiE. — More or less soft and slender; thread-shaped; 
jointed. 
Spores external on the branches. 
Cladostephus ; verticillatus, spongiosus. 
Ch^topteris ; plumosa. 
Sphacelaria ; filicina, Sertularia, scoparia, cirrhosa, fusca, radicans, racemosa. 
Ectocarpus ; siliculosus, amphibius, fenestratus, fasciculatus, Hincksige, tomen- 
tosus, crinitus, pusillus, distortus, Landsburgii, littoralis, longifructus, 
granulosus, spbseropborus, bracbiatus, Mertensii. 
Myriotrichia ; clavseformis, filiformis. 
* Formerly Sphacelaria plumosa (Fig. 72). 
