XXXVUl INDBX. 



FOURTH GREAT DIVISION OF THE ANIMAL KINGDOM. 



ANIMALIA RADIATA. 



Distribution of the Radiata into five Classe«, 389. 



CLASSES. 



I. ECHIN'ODERMATA. | III, AciLEPHA. 



II. Entozoa. j IV. Polypi. 



V. Infusoria. 



. CLASS L— ECHINODERMATA. 

 Order I.— PEDICELLATA, 390 

 Asterias, 391 



Asterias proper, 391 



Ophiura, 392 



Euryales (Gorgonocephala, Leach), 393 



Comatula(Alecto, Leach), 393 

 Encrinus, 393 



Apiocrinites, 394 



Encrinites, 394 



Pentacrinus, 394 



Platycrinites, 394 



Poteriocrinites, 394 



Cyathocrinites, 394 



Actinocrinites, 394 



Rhodocrinites, 394 



Eugeniacrinites, 394 

 Echinus, 394 



Echinus proper, 395 



Echinoneus, 396 



Nucleolites, 396 



Galerites, 397 



Scutella, 397 



Rotula, 397 



Cassidulus, 397 



Anachites, 3 98 



Clypeaster, 398 



Fibular ia, 398 



Spatangus, 398 



Brissoides, 398 



Brissus, 399 

 Holothuria, 399 



OrderII.— APODA, 401 



Molpadia, 401 

 Minyas, 401 

 Priapulus, 401 



