232 MARINE PLANTS AND ANIMALS. 



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

 original fragments of rock : — 



Two tufts oi Delesseria sanguinea^ each with nume- 

 rous leaves. 



Two 0^ Rhodymenia juhata, one small, the other a 

 large tuft. 



A small Ptilota plumosay growing with one of the 

 last-named. 



A Chondriis crispus, 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, which 

 were at this time all alive and healthy : — 



Anthea cereus. 



Actinia hellis, a large specimen. 



hellis, a half-grown one. 



anguicoma, large. 



angiiicoma^ small. 



nivea. 



rosea. 



rosea, a small specimen. 



mesemhryanthemum, young. 



mesemhryanthemum, young, another variety. 



Crisia de?iticulata, a large tuft. 



Coryne ?, youn'g. 



'Pedicellina Belgica, two numerous colonies. 



Memhranippra inlosa. 



Doris fbilineata'} J. 



Polycera 4.-lineata, very small. 



Phyllodoce lamelligera, about 1 1 inches long. 



A coil of small Annelides. 



