Part first. 



5. Sea-CUCUmberS, slug-shaped bodies, covered with pointed 

 suckers. The delicate brown feathery undergrowth will 

 be seen to be the tentacles of numerous sea- cucumbers 

 (Cucumaria, fig. 9), adhering to the_ rocks; each has ten 

 tentacles round its mouth, in crawling they are retracted ; 

 in the larger species (Holothuria, fig. 10) which is black, 

 they are not obvious; Stichopus (fig. 11) is reddish, a foot 

 long, and flat. 



Fig. 9. Cucumaria Planci, 

 on a stone, with out- 

 stretched tentacles, 



&Z 



Fig. 10. Hololhuria tubulosa, 

 Vs nat. size. p. 65. 



Fig. 1 1 . Stichopus regalis, 

 */2 nat. size. p. 66. 



The starfishes, sea-urchins and sea-cucumbers adhere 

 to the glass or rock by numerous suckers, with which they 

 crawl (for details v. p. 64), the brittle-stars move by wriggling, 

 the feather-stars can swim. 



