VII[ 



ECHINOBERMA T A— SYSTEM A TIC RE ] 'IE W 



297 



Pcntaenros, AmpJiiaster, Ciilcila, Asterodiseus, etc. Fam. 7. Gynmasteriidse : Guiii- 

 nastcria, Tyl(tstcr, Astrropsis, 

 ilaryinastcr, etc. Fam. 8. As- 

 terinidse : Garn'rUi, Aster ina^ 

 Pii/nu'pcs, etc. 



Order 2. Cryptozonia. 



Asteroidea, in which the mar- 

 ginal plates are indistinct and 

 more or less rudimentary in the 

 adult. The supramarginal plates 

 are often separated from the in- 

 framarginal by intermediate plates The 

 papuliE are not limited to the apical sm 

 face, but often occur also between the 

 marginal plates and on the oral (lowei 



nr 



\ 



Fi*;. 240. — Anthenea tuberculosa, Gray? 



jiiv. (after Sladen). 1, Supramarginal plates ; 

 2, pedicellariii.- ; 3, iiiadreporite ; 4, anus. 



Fig. 241.~Cneimdaster Wyvillii (after Sladen). <k, Dorsocentral ; r, radials ; hn, basals ; 

 s)?i, supramarginals ; d, dorsals ; f, terminals. 



surface of the body. Ambulacral plates narrow, closely crowded. Tube- feet 'often 

 in four rows. In the oral skeleton the ambulacral or interanibulacral plates are 

 prominent. Pedicellarire sessile or pednnculate. 



