Ayiatomy of certain Rotifers. 47 



v.t. Vibratile tag. e. External opening of united por- 



m.s.c. Marginal sense-cells of co- lions of lateral canah, 



rona. d. United terminations of lateral 



c.l.c. Coiled portions of lateral canals. 



canals in the corona. z. Cells of unknown significance 



s. Spindle-shaped cells in foot. placed between stomach and 



mh. Manubrium. intestine. 



fm. Fulcrum, ph. Pharynx. 



Plate IV. 



Fig. 1. Transverse section of Melicerta conifera immediately beneath the 

 base of the corona. Zeiss obj. E, oc. 3. 



Fig. 2. Next section of same Rotifer, showing brain and salivary recep- 

 tacles. Zeiss obj. F, oc. 3. 



Fig. 3. Next section but one of same Rotifer, showing mastax and sur- 

 rounding parts. Zei.s6 obj. E, oc. 3. 



Fig. 4. Transverse section through mastax and surrounding parts of Meli- 

 certa ringetis. Zeiss E, oc. 3. 



Fig. 5. Transverse section thi-ough oesophagus and surrounding parts of 

 Melicerfa conifera, showing opening of gastric gland into the 

 oesophagus. Zeiss obj. F, oc. 3. 



Fig. 6. Transverse section through the middle of body of same Rotifer. 

 Zeiss F, oc. 3. 



Fig. 7. Transverse section of same Rotifer immediately beneath the 

 junction of foot with body. Zeiss F, oc. 3. 



Fig. 8. Vertical section through Melicerfa ringen^, showing cells of un- 

 known significance placed between stomach and intestine. 

 Zeiss E, oc. 3. 



Plate V. 



Fig. 9. Transverse section of Lacinularia socialis immediately beneath 

 the junction of foot with body. Zeiss F, oc. 3. 



Fig. 10 A. Vertical section through lateral canal of LucinuJarin socialis. 

 Zeiss F, oc. 3. 



Fig. 10 b. Transverse section of Lacinularia socialis, showing gastric 

 glands and one duct passing into the oesophagus. Zeiss E, 

 oc. 3. 



Fig. 11. Vertical section through margin of corona and surrounding 

 parts of Lacinularia socialis, showing marginal sense-cell and 

 coiled portion of lateral canal in the corona. Zeiss F, oc. 3. 



Fig. 12. Transverse section through corona of Lacinularia socialis, show- 

 ing brain and nerve-fibres terminating in marginal sense-cells. 

 Zeiss F, oc. 3. 



Fig. 13. Transverse section through same Rotifer, showing intestine with 

 its external aperture and external opening of united portion of 

 lateral canals. Zeiss E, oc. 3. 



Fig. 14. Vertical section through Brachionus rubens, showing flame-cell 

 with portion of latei'al canal. Zeiss K, oc. 3. 



