22 ECHINODERMA. 
Family 6. ASTERINID A. 
Asterinide, Gray, Syn. B. M. 42nd ed. (1840) p. 62; td. Ann. § Mag. 
vi. (1840) p. 288; td. Brit. Rad. (1848) p. 21; Perrier (sens. emend.), 
Arch, Zool. expér. iv. (1875) p. 301; Viguier (sens. emend.), Arch. 
Zool. expér. vii. (1878) p. 205; Perrier, Nouv. Arch. vi. (1884) 
p. 219; Sladen, Chall. Rep, Ast. (1889) p. xxxiil. 
The Asterinide are phanerozonate Asteroidea with small marginal 
plates in which the abactinal skeletal plates are imbricated and 
carry spines on their free edge, or are irregularly rounded and bear 
tufts of spinelets. 
Two genera: Asterina and Palmipes. 
Order 2. CRY PTOZONTA. 
Cryptozonia, Sladen, Chall. Rep, Ast. (1889) p. xxxiv. 
Asteroidea with reduced or obsolete marginal plates; when 
present the upper and lower rows do not touch, and their axes are 
not in parallel planes. Papule not confined to the area bounded 
by the superomarginals. Ambulacral plates more or less crowded 
and narrow. Adambulacral plates may or may not take a pro- 
minent share in the formation of the mouth-plates. Pedicellariz 
foraminate in Linckiidee only. 
Family 1. STICHASTERID. 
Stichasteridee, Per. Ann. Sct, Nat. xix. (1885) art. 8, p. 15. 
Cryptozonate Asteroids with major or minor pedicellariz or both ; 
ambulacral tubes quadriserial at base of arms at least ; skeleton of 
arms well developed, the ossicles arranged in regular longitudinal 
rows and imbricating. 
Three genera: Stichaster, Neomorphaster, and Zoroaster. 
Family 2. SOLASTERIDA. 
Solasteridse, Perrier, Nouv. Arch. Mus. (2) vi. (1884) p. 210; Svaden, 
Chall. Rep. Ast. (1889) p. xxxvi. 
The marginal plates more or less obscured, the abactinal skeleton 
more or less loosely reticulate, with the spines on its plates arranged 
in paxilliform groups. 
One genus: Solaster. 
