446 *^- ^- FULI.ARTON, On the generative Organs etc of Tomopteris. 



Plate 28. 



Fig. 27. Egg with uucleus divided into two portions. Zeiss 

 Oc. 8, Apo. 8 mm. 



Fig. 28. Sagittal section of oosphère with one macro-and one 

 micromere. Zeiss Oc. 8, Apo. 8 mm. 



Fig. 29 — 32. Oosphères with two, four, eight, sixteen and thirty- 

 two micromeres respectively. Zeiss Oc. 8, Apo. 8 mm. 



Fig. 33. Portion of the body of a young female opposite the 

 A^ parapodium showing the incipient genital orifice. Zeiss Oc. 8, 

 Apo. 16 mm. 



Fig. 34. Portion of the bod}- of a nearly adult female opposite 

 the 4'*' and 5"" parapodia showing the genital orifice still closed. Zeiss 

 Oc. 8, Apo. 16 mm. 



Fig. 35. Portion of the body of a fully ripe female opposite the 

 3 ^^, 4'*' and 5"' pairs of parapodia showing the external genital orifices 

 open. Zeiss Oc. 2, Apo. 8 mm. 



Fig. 36. Portion of the ventral wall of Fig. 35 showing the 

 genital orifice in its relation to the muscular bands of the body wall. 

 Zeiss Oc. 8, Apo. 8 mm. 



