APPENDICULARIA OF JAPANESE WATERS. 13 



glandular gastric cells borders the posterior lower margin of the 

 left stomach, extending from the apex of the blind-sac (fig. 14). 

 The right stomach is much smaller and is connected to the 

 left at the upper anterior portion of the latter, similarly to the 

 stomach of Oih. fusiformis (fig. IG). The two lobes of the 

 stomach are widely separated from each other. The intestine and 

 rectum are slender and long. 



The genital glands in the immature condition form a trian- 

 gular mass, lying between the two lobes of stomach. The single 

 ovary occupies the central parts and the testes the lateral parts 

 of the mass (figs. 17 and 18). In a little later stage, both 

 testes send out many lobes from their inner opposite faces. 

 In still more advanced stages, these lobes subdivide into smaller 

 lobes and present a complex acini-like form and then the boundary 

 between the two testes can no longer be distinguished. 



The ovary is always flat and covers the whole back of the 

 testes. The mass of the genital glands, after advanced development, 

 is of a shield-like form ; its lateral portions are somewhat inflected 

 anteriorly and cover the whole lateral surfaces of the alimentary 

 canal. 



The tail and its muscular coating are broad. No subchordal 

 cells are present. The ratio of tail length to its greatest breadth 

 is 4.2 : 1 ; that of its greatest breadth to the breadth of the 

 muscle, 1.5 : 1, 



The largest specimen I have obtained measured 3214 // in 

 trunk length and 10428 ii in tail length. 



