Classification of Animals 



285 



CLASSES OF WORMS, SOME ORDERS AND GENERA. 



i. Order Turbellaria, f i. Planaria 



planarians \ 2. Dendroccelum 



i. Class Platy- 

 helminthes, 

 flat segmented < 

 or unseg- 

 mented worms 



2. Order Trematodes, f i. Distomum 



flukes \ 2. Fasciola 



3. Order Cestodes, f i. Dog, Tania 



tapeworm \ 2. Human, Bothriocephalus 



Order Acanthocephali, parasitic, without alimentary 

 canal Pig parasite, Echinorynchus 



1. Human roundworm, Ascaris 



2. Pin worm, Oxyuris 



3. Palisade-worm, Enstrongylus 

 \ 4. Pork parasite, Trichina 



2. Order Nematodes' 

 /rz/e round- 

 worms 



3. Order Chaetognathi, Sagitta 



~, -D A . r . . 7 . , , f i. Oval, cleft tail, Squamella 



3. Class Rotifers, microscopic ciliated \ ^ Elongaie)Worm -\ike, Rotifer 



worms, wheel animalcules j 



4. Class Polyzoa, colonial, moss-like worms - 



1. Pedicellina 



2. Myriozoum 



3. Paludicella 



4. Plumatella 



/_ -n,. , ., , i j f i. Terebratulina 



5. Class Brachiopoda, worms with dorsal and ven- I 2 ^ n a u i a 



tral shell resembling mollusks ^ ' jyfafaa 



6. Class Nemertina, s0// -flattened worms, not f i . Anopla, Mekelia 



distinctly segmented \ 2. Enopla, N emeries 



_~ f i. Hirudo 



i. Order Hirudinea, leeches \ 2. Nephelis 

 [ 3. Clepsine 



2. Order Annelides 



1. Oligochceta, f i. Lumbricus 



earth- < 2. ATaw 



worms [3- Allalobophora 



f i. Nereis 



2. Chaetopoda, I 2. Clymenella 



sea-worms \ 3. Amphitrite 

 I 4. Cirratulus 



