232 MARINE PLANTS AND ANIMALS. 



Algae, all in a growing state, and attached to the 

 original fragments of rock : — 



Two tufts oiDelesseria sanguinea, each with nume- 

 rous leaves. 



Two of Rhodymenia jithata, one small, the other a 

 large tuft. 



A small Ptilota plumosa, growing with one of the 

 last-named. 



A Chondi'us crisjms, with 



An Ulva latissima^ growing parasitically on one of 

 its fronds. 



These seven plants had supplied for eight weeks 

 the requisite oxygen for the following animals, wliich 

 were at this time all alive and healthy : — 



Anthea cereus. 



Actinia hellis, a large s^iecimen. 



hellis, a half-grown one. 



anguicoma, large. 



anguicoma, small. 



nivea. 



rosea. 



rosea y a small specimen. 



mesemhryanthemum, young. 



• mesemhryanthemum, young, another variety. 



Crisia denticiilata, a large tuft. 



Coryne ?, young. 



Pedicelli?ia Belgica, two numerous colonies. 



Memhrampora pilosa. 



Doris fhilineata'} J. 



Volycera 4,- line at a, very small. 



Phyllodoce lamelligera, ahout 1 1 inches long. 



A coil of small Annelides, 



