232 MARINE PLANTS AND ANIMALS. 



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

 original fragments of rock : — 



Two tufts of Delesseria sanguinea, each with nume- 

 rous leaves. 



Two oi Rhodymenia juhata, one small, the other a 

 large tuft. 



A small Ptilota plumosa, growing with one of the 

 last-named. 



A Chondrus ci'isjms, with 



An Ulva latissima, growing parasitically on one of 

 its fronds. 



These seven plants had supplied fpr eight weeks 

 the requisite oxygen for the following animals, which 

 were at this time all alive and healthy : — 



Anthea cereus. 



Actinia hellis, a large specimen. 



hellis, a half- grown one. 



anyuicoma, large. 



anguicomay small. 



nivea. 



rosea. 



rosea, a small specimen. 



mesemhryanthemum, young. 



mesemhryanthemum, young, another variety. 



Crisia denticulata, a large tuft. 



Coryne ?, young. 



Pedicellina Belgica, two numerous colonies. 



Membranipora pilosa. 



Doris (hilineata ?^ J. 



Polycera 4.-lineata, very small. 



Phyllodoce lamelligera^ about 1 1 inches long. 



A coil of small Annelides. 



