PLATE 44.— Rotatoria. 



Figure 



1 . Megalotrocha flavicans. 



2. Megalotrocha flavicans, jaws. 



3. Melicerta ringens. 



4. Melicerta ringens, removed from its sheath, a, rotatory lohes ; b, lips ; c, 



accessory ciliated lobe ; d, tentacular processes ; c, pharynx or oesophagus 

 and jaws ; /, g, upper and lower stomach ; li, anus ; fc, ovary ; I, oviduct ; 

 to, spermatic organ ? ; n, tail ; o, disk ; p, sarcodic globules ; q, ovum. 



5. Melicerta ringens, tentacular process of. a, setae ; b, conical body ; c, muscle. 



6. Melicerta ringens, jaws of. 



7. Metopidia triptera. a, contractile sac. 



8. Microcodon claims. 



9. Monocerca rattus. a, contractile sac ; b, muscle. 



10. Monolabis gracilis. 



11. Monostyla quadridentata. 



12. Monura dulcis. 



13. Noteus quadricornis. 

 14. ' Notommata centrum. 



15. Notommata centrum, jaws of. 



16. (Ecistes crystallinus, 



17. Philodina erytliroplitlialma. 



18. Pleurotroclia gibba. 



19. Polyartlira platyptera. 



20. Pterodina patina. 



21. Ptygura melicerta. 



22. Rattulus lunaris. 



23. Rotifer vidgaris. a, contractile sac. 



24. fSalpina redunca, dorsal view. 



25. Stephanoceros Eieldwmii. a, tremulous bodies. 

 20. Synchosta baltica. 



27. Scaridium longicaudum. 



28. Stephanops cirratus. 



29. Squamella oblonga. 



30. Triarthra longiseta. 



31. Trioplithalmus dorsalis. 



32. Theorus vernalis. 



33. Typlilina viridis. 



