5O2 



RADIATES : ECHINODERMS. 

 Fig. 486. 



Mellita quinqncfora, Ag. Tropical America. 



Fig - 487 ' gannm, RmnpJiia, Arach- 



iwidcs, EddnaracJnmts, 

 D end raster, LobopJiora, 

 Afellita, Encode, Rotula, 

 Echinodisais, and Cly- 

 pcastcr, are the principal 

 ones. Clypcastcr, Encope, 

 and Mellita are found on 

 the southeastern coast 

 of the United States ; 

 Dendraster, at San Fran- 

 cisco ; Echinarachnius, 

 coast of New England 



Rotnla Rn,phU t Klein. Cape Palmas. and northward. 



CASSIDULIDTE. - - This Family has the ambulacra peta- 

 loid, no jaws, peristome angular, central or subcentral. 

 Genera : Cassidulus, PygorJiyncJnts, EcJiinolampiis, etc. 



SPATANGID^:. This Family contains echinoids which 

 are more or less depressed, heart-shaped, with the ambu- 

 lacra petaloid, and the peristome eccentric. They are 



