Further Studios on Reproduction in Sagitta. 283 



Fig. D. a, b. Opening of tlic exterior .sphincter of the oviduct, and escape of 

 the egg. 



Fig. E. Spermatozoa escaf)ing from the; si)erm-duc,t uinh'r pressure on the 

 cover-glass. 



Fig. F. Longitudinal section of_ovary, oviduct, and sj>erni-duct. 



