■46 ' Art. 4.— T. Kaburaki : 



The paired ovary, which is of a spherical shape, is placed nearly- 

 half-way between the anterior end of the body and the pharynx- 

 insertion, one on either side close to the outer side of the longi- 

 tudinal nerve cord. At the posterior aspect the oviduct leaves the 

 ovary in the form of a funnel-like widening, which soon assumes the 

 character of a narrow duct, proceeding straight backwards. Behind 

 the genital opening it nears the median line, slightly rising at the 

 same time, and finally unites with its fellow of the opposite side 

 to form a common duct, the glandular canal. The direct wall of 

 the oviduct is made up of a ciliated epithelium, beneath which 

 comes a muscular layer. The vitelline glands, made up of closely- 

 packed, large cells, extensively fill up the interspaces between the 

 gut branches. They are in connexion with the oviduct at numer- 

 ous points. 



The glandular canal opens from behind into the atrium, after 

 receiving enormous quantities of unicellular glands. The canal is 

 internally lined with an epithelium of columnar cells and exter- 

 nally with a layer of parenchyme, including muscular fibres, and 

 perforated by the ducts of the glands. 



Genus Microplana Vejdosky, 

 20. Microplatta ruteocephala, n. sp. 



(PI. figs. 21-23.) 



Three representatives of this new species were captured by the 

 late Professor Ijima in July, 1886, in Nikko. 



According to the collector's notes and sketches taken when 

 the animals were living, the body was nearly circular in cross 

 section, elongate, slender and for the most part uniformly broad, 

 though it tapered more gradually to the rounded anterior than to 

 the posterior end which was pointed. The present species is 

 wholly deviod of sensory grooves as well as of creeping sole. The 

 largest specimen measured 22 mm. in length and 1-5 mm. in 

 breadth, while smallest was 9 mm. long by 0-8 mm. broad. 



