Tank Nr. 1. 



fig. 6), much larger and generally with seven arms; 

 Asterias (fig. 3), large and greenish, with pointed knobs; 

 Astropecten (fig. 1), with points like little tusks fringing 

 the arms; Pahmpes, arms webbed, like a pentagonal 

 piece of brick-red paper. 



2. Brittle-Stars, with five (rarely six) arms, thinner and more 

 snake-like than the starfishes, round body like a thick 

 half-penny (Ophioderma, fig. 4). 



3. Feather-Stars An tedon, fig. 5), mostly holding by their backs 

 to dead coral-stems (Antipathes, see tank 21) in the centre of 

 the tank; they are yellow or red and have ten plumed arms. 



Fig. 5. Antedon rosacea, 



attached to a branch of Antipathes, 



1 -2 nat. size. pag. 65. 



Fig. 6. Luidia ciliaris, 



1 4 nat. size. pag. 65. 



4. Sea-urchins, globular or bun-shaped, covered with spines. 

 Sphaerechmus fig. 7), generally purplish, spines tipped 

 white; Echinus (p. 65\ eight to ten inches across, spines 

 white; Doroddaris (fig. 8), pink with knobs, bearing a 

 few strong, stick-like spines - 



Fig. 7. Sphaer echinus gramdaris, 

 1 -2 nat. size. p. 65. 



Fig. S. Doroddaris papillata, 



1 /2 nat. size. The sucker-feet are not 



visible, p. 65. 



