98 



INTRODUCTORY OBSERYATIOKS. 



164 

 The principal species may be thns distribnted into zones of 

 depth.* 



Littoral Zone. Clava mnltieornis ; Coryne Listerii ; Tnbn- 

 laria larynx; Sertularia pu7nila; Pliimularia eclmmlata; 

 Laomedea ilexuosa; Campanularia Johnstoni, integra; 

 Actinia mesemhryanthemum^ troglodytes, coriacea; Lncer- 

 naria anricula; Eiicratea ehelata; Cellepora Hassallii; 

 Lepralia verrucosa, Tinicornis, punctata, granifera, hyalina; 

 Membranipora p//osa, spinifera ; Flnstrella hispida; Cellu- 

 laria reptans, scruposa; Alcyonidium hirsutum; BoAver- 

 bankia imbricata; Valkeria uva; Pedicellina echinata. 

 Laminarian Zone. Tubiilaria indivisa; Sertularia operculata, 

 rugosa ; Plumularia setacea ; Laomedea geniculata ; Cam- 

 panularia Johnstoni, syringa; Actinia coriacea; Lepralia 

 coccinea, hyalina; Membranipora menibranacea, pilosa, 

 Flemingii ; Cellularia reptans, scruposa ; Bugula fastigiata ; 

 Flustra foliacea, ttmncata; Alcyonidium gelatinosum, 

 hirsutiwi. 



* The species which contribute most to give a character to the zone have been de. 

 noted by italics. 



