Tank Nr. 22. 



45 



Fig. 129. Four specimens of Avicula hirundo attached to a stone, 



^2 nat. size. p. 83. 



Fishes. Sea-horse {Hippocampus, fig. 130), head like the knight 

 in chess , tail curling forward , generally attached to a 

 coral or weed. 



Crustaceans. Sometimes hanging down from floating wood or 

 pumice the *Goose-barnacle (Lepas, fig. 131). Crawling on 

 the sand or half hidden in it *Penaeus (fig. 132) and *Ste- 

 nopus (Fig. 133). 



Fig. 1.30. Hippocampus 

 guttulatus (Sea-horse), 

 V-i nat. size, p. 95 



Fig. 131. Lepas nnafifera 

 (Goose-barnacle) hanging 

 to a floating piece of pumice-stone, 

 '/a nat. 'size. p. 75. 



