APPENDICULAR! A OF JAPANESK W^ATERS. 15 



or four of them also occur at the bottom of the connecting portion 

 of the two lobes (fig. 4, PL II.). The intestine arises from the 

 lower posterior corner of the right lobe. It is a short canal 

 opening to the right posterior side of the rectum (fig. 4). 

 In all my specimens of this species — only 2 in number — the 

 outer wall of the right stomach lobe and of the intestine has a long 

 narrow inner fold, which extends from the upper side of the 

 stomach to the lower side of the intestine and is visible in surface 

 view as a peculiar line (fig. 2). Whether the presence of this 

 fold forms a peculiarity of the species or is due to artificial 

 change, I can not determine on account of the scantiness of the 

 material. 



The testis is paired. It covers in advanced stages nearly 

 one half of the lateral side of the alimentary canal, and that 

 part of it which lies behind the alimentary canal, becomes divided 

 into a number of lobes like those of Oih. longicaiula. The ovary 

 is single and flat, and covers the back side of testis. 



The tail has a wide musculature, but is without subchordal 

 cells. The ratio of tail length to its greatest breadth, and that 

 of its greatest breadth to the breadth of the musculature are 

 respectively ö : 1 and l.ö : 1. 



The larger specimens measure 1800 />< in the length of trunk 

 and 6250 // in that of tail. 



5. Ollxoplenrci eoriiutoffastra^ nov. sp. 

 PI. IL, figs. G-11. 



Buccal gland wanting. Eisen's oikoplast present. 

 Blind-sac of stomach long and large, ascending obli- 



