44 



Part first. 



Tank No. 22. 



Ringed Worms (p. 76). Spirographis (fig. 120) in straight tubes 

 composed of hardened shme, with palm-hke crown of gills. 

 The red feathers on coiling white tubes are Protula (fig. 121). 

 Hydroides, smaller and always massed together (fig. 122). 

 Sea-mouse {Aphrodite, fig. 130) crawling on the sand. 

 Molluscs. A. Snails (p. 92). Worm-shell {Vermetus, fig. 123) 

 resembling the worm Protula, but easily distinguishable by 

 its two feelers. Ear-shell (Haltotis, fig. 125) on the sand. 



B. Bivalves (p. 95). Oysters (Ostrea, 

 fig. 124); Avicula (fig. 126); Pinna (fig. 127), 

 horny-looking, ragged; etc. 

 Sea-anemones (p. 63). Ccrianthus (fig. 128) large, 



grass-green or brown. Also other kinds. 

 Crustaceans (p. 78). Sometimes hanging down 

 from floating wood or pumice the * Goose- 

 barnacle {Lepas, fig. 129). Crawling on the 

 sand or half hidden in it *Pcnaeus (fig. 132) 

 and * Stenopus (fig. 131). 

 Plants as in Tank 21. 



On request the attendant 



will drive the Tube-worms 



back into their tubes. 



Fig. 120. Spirographis 



Spallanzanii, 



V2 nat. size. p. 76. 



Fig. 121. Protula 



intestiimm, 

 1/2 "at. size. p. 76. 



Fig. 122. 



Hydroides imcinafa. 



p. 76. 



