Order Il.—APODA—Cco7itinued). 



Lithoderma, 401 



Sipunculus, 402 



Bonellia, 402 



Thalasseraa, 402 



Thalassema proper, 408 

 Echiurus, 403 

 Sternapsis, 403 



CLASS II.— ENTOZOA. 

 Oudkr I.— NEMATOIDEA, 404 



Filaria, 405 



Trichocephaliis, 405 



Trichostoma, 406 

 Oxyuris, 406 



CucuUanus, 406 



Ophiostoma, 406 



Ascaris, 406 



Strongylus, 407 



Spiroptera, 408 



Physaloptera, 408 



Sclerostoma, 408 



Liorhynchus, 408 



Pentastoma, 408 



Prionoderma, 409 



Lemaea, 409 



Lernpea proper, 409 

 Pennella, 410 

 Sphyrion, 410 

 Anchorella, 410 

 Brachiella, 410 

 Clavella, 411 

 Chrondracanthui, 411 



Nemertes, 411 



Tabularia, 412 



OiDhiocephalus, 412 



Cerebratula, 412 



Ordkr II.— PARENCHYMATA, 412 



Fam. 1. ACANTHOCF.PHALA, 412 



Echinorhynchus, 412 

 Hseruca,413 

 Fam. 2. — Trematodea, 413 



Fasciola, 413 



Festucaria, 414 

 Strigea, 414 

 Caryophyllseus, 414 

 Distoma, 414 



HoIostoma,415 



Polystoma, 415 



