6 THE NATURE OF ANIMAL LIGHT 



Antipatharia 



Alcyonaria 



. Alcyonium, Gorgonia, Isis, Mopsea 



Pennatulacea 



Pennatula, Pteroides, Veretillum, Cavernularia. 



Funicularia, Renilla, Pavonaria, Stylohelemon, UTiihellularia, 

 Virgulariaf 

 Cten ophora ( Comb- j ellies ) 

 Cydippida 



Pleurohranchia. 



Lohata 



Mnemiopsis, Bolinopsis, Leucothea (Eucharis) . 



Cestida 

 Cestus. 



Beroida 

 Bero'e. 



IV. Platyhelminthes 



Turbellaria ( Flat-worms ) 

 Trematodes (Parasitic flat- worms) 

 Cestodes (Tape-worms) 

 Nemertinea (Nemertines) 



V. Nematlielminthes 



Nematoda (Round worms) 

 Gordiacea (Hair worms) 

 Acanthocephala ( Acanthocephalids ) 

 Chaetognatha ( Sagitta ) 



VI. Trochelminthes 



Potifera (Wheel animalcules) 

 Gastrotricha ( Chsetonotus ) ) 

 Kinorhyncha (Echinoderes) 



VII. Molluscoidea 



Bryozoa (Corallines) 

 Entoprocta 



Ectoprocta 



Membranipora, Scrupocellaria, Reteporaf Flustra? 

 Brachiopoda (Lamp shells) 

 Phoronidea (Phoronis) 



VIII. Annulata 



Archiannelida (Primitive worms, including Dinophilus) 

 Chcetopoda (True worms) 



