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 (Holo- 

 thuria, fig. 10) which is black, they are not obvious; Stichopus 

 (fig. 11) is reddish, a foot long, and flat. 



Fig. 9. Cucumaria Plane i, 

 on a stone, with out- 

 stretched tentacles, 

 ] / 2 nat size. p. 65. 



. 10. Holothuria tubulosa, 



x /3 nat. size. p. 65. 



Fig. 1.1. Stichopus regalis, 

 */ 2 nat. size. p. 65. 



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. 



