242 ZOOLOGY. 



4. Filaria. Bodi/ entirely filiform. 



5. Scolex, Body minute, gelatinous, opake ; head exertil© 



and retractile ; with four pellucid auricles. 



6. Ligula. Body linear, equal, long, with an impressed 



dorsal suture. 



7. Linguatala. Body depressed, oblong ; mouth situated 



forwards, and surrounded by four passages, 



8. Strongylus. Body round, long, the fore-part globular 



and truncate, with a circular aperture fringed at the 

 margin ; hind-part of the male hooded^ of the female 

 pointed, 



9. Echynorhynchiis. Body round ; proboscis cylindrical, 



retractile, crowned with hooked prickles, 



10. Hceruca. Body round ; proboscis wanting ; head 

 crowned withpr/cAr/e^. 



11. Cuculanus, Body pointed behind / the fore part ob- 

 tuse, with an orbicular mouth, 



12. Caryophylloeus, Body round, smooth, with a large 

 dilated mouth, 



13. Fasciola* Fluke. BoeZ^ depressed, ovate ; with a ter- 

 minal and lateral pore. 



14. Tencea, Tape- Worm. Body flat, jointed ; head with 

 four orijices for suction, below the mouth ; mouth ter- 



