Anatomij of certain Tioiifarfi. 47 



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



m.s.c. Marginal sense-colls of co- tions uf lateral canah. 



rona. d. Uniterl terminations of lateral 



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



canals in the corona. z. Cells of unlmown significance 



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



ml). Manubrium. intestine. 



fill. Fulcrum. ^jA. IMuirynx. 



Plate IV. 



Fiff. 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. Zeiss obj. E, oe. 3. 



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

 certa ringens. Zeiss E, oc. 3. 



FH,g. 5. Transverse section through a\sophagus and surrounding parts of 

 Melicerta conifera, showing opening of gastric gland into the 

 oesophagus. Zeiss obj. F, oe. 3. 



Fig. G. 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 Melicerta ringens, showing cells of un- 

 known significance placed between stomach and intestine. 

 Zeiss E, oc. 3. 



Plate V. 



Fig. 9. Transverse section of Lacinula7-ia soeialis immediately beneath 

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



Fig. 10 A. Vertical section through lateml canal of Lacinularia soeialis. 

 Zeiss F, oc. 3. 



Fig. 10 b. Transverse section of Lacinularia soeialis, 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 soeialis, showing marginal sense-cell and 

 coiled poi-tion of lateral canal in the corona. Zeiss F, oc. 3. 



Fig. 12. Transverse section through corona of Lacinularia soeialis, 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 lateral canal. Zeiss K, oc. 3. 



