140 C. ISHIKAWA. 



Of the inner organs we may mention that the coecal processes are 

 in the lateral view of the animal nearly straight or only slightly curved. 



The freshly laid eggs are oval in shape, with a central oil globule of 

 a light yellow colour, and with beautiful green deutoplasm. 



The colour of the animal is of a very light bluish-green ; the intesti- 

 nal contents of a beautiful bluish-green anteriorly, becoming more yellow 

 towards the neck-region and passing to a vandyke-green posteriorly. 



Gamogenetic female (Fig. 3). 



Owing to the formation of the ephipium the gamogenetic females 

 differ from the parthenogenetic one in the shape of the dorsal border of 

 the carapace which bulges out rather high just behind the very shallow 

 neck-constriction, behind which it is less curved than in the other. The 

 spine of the carapace is usually shorter and ends in blunter point. The 

 shape of the ephipium as seen in the lateral view, is like that of the 

 carapace, its dorsal edge being less curved than its ventral ; its anterior 

 border nearly straight, and its lower border gradually produced posterior- 

 ly. The entire surface of the capsule, excepting the hinge-border, is 

 covered with minute meshes of hexagonal areas. 



Male (Fig. 4). 



The size of the male is as well known, much smaller than that of 

 the female, being only about -/a iii length that of the latter, and its general 

 shape also differs considerably from it. 



The shape of the head is nearly similar to that of the female, but 

 its dorsal crest less prominent, and its rostral projection only represent- 

 ed by a low rounded knot. 



The carapace is, as usual, comparatively much narrower than in the 

 female, its dorsal border is a little elevated behind the neck-constriction 

 as in the gamogenetic female ; behind the elevation it passes with a 

 slight cuLve towards the spine of the carapace. This spine is also 

 shaped like that of the gamogenetic female, but is comparatively a little 

 longer. The lower border of the carapace is, however, quite dissinnlar 



