Tank Nr. 1. 



(fig. 5) , much larger and generally with seven arms ; 

 Asterias (fig. 3), large and greenish, witli i)()inted knobs; 

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

 the arms; PaJm'ipes, arms webbed, like a pentagonal piece 

 of brick-red paper. 



2. Brittle-stars, witli five ('rarely six) arms, thinner and more 



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

 ha]t'-])onny ( iphioderma, fig. 4). 



3. Feather-stars lAntcdoUs fig. Jn, mostly holding by their backs 



lo dead coral-stems yAuiipailiex, see tank 2ij in the centre of 

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



Fig. 5. Luidia ciliaris, 

 */^ nat. size. pag. 65. 



Fig. 6. Antedoti rosacea, 



attached to a brancli of Aiitipathes, 



'/j uat. size. pap;. 65. 



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

 Sphaerechinus (fig. 8) , generally purplish , spines tipped 

 Avhite; Echinus (p. Go), eight to ten inches across, spines 

 white; I)orocidai-is (fig. 7), pink with knobs, bearing a few 

 strong, stick-like spines. 



4v ^>'^^' 



Fig. 7. Dorocidarls papillatn, 



'/^ Tiat. size. The sucker-feet are not 

 visible, p. 65. 



^^fgaSjj;;:;^^^^:^^^:?^^??^^ ^ 



Fig. H. Sphaerechinus f/rnnularis, 

 '/^ nat. size. p. 65. 



