134 



K. KISHINOUYE. 



The number of the marginal lobes varies at different stages of 

 development and even in different octants of one and the same individual, 

 so that it is not much reliable for determination of the species, as K. 

 von Lendenfeld* had already noticed. 



The oral pillars are short and weak. They increase in breadth as 

 they approach the oral disc (figs. 4, 5). Their interior wall is thin, 

 especially at the median line where the wall is elevated and continues to 

 the intergenital plate. The subgenital ostia between two oral pillars is 

 low and broad, is 8 times as broad as the oral pillars. The single 

 subgenital cavity is high and spacious. 



The oral disc is subquadrate and thin (figs. 3, 4, 5). Its upper surface 

 is flat and smooth. At its lower surface we find the cross of the oral 

 suture (fig. 5). Each limb of the cross is bifurcated and give rise to 

 axial sutures of the oral arms. The distance between the points of 

 bifurcation and intersectng point of the cross is very short. At each of 

 these five points, viz. four points of bifurcation and one point of 

 intersection, there is a whip-like filament (fig. 3). The filament at the 

 point of intersection is longer and larger than the others. 



The oral arms are long and narrow. They arise from the lower 

 surface of the oral disc, almost equally distant from each other (fig. 5). 

 I am told that they were same in color with the umbrella, and the 

 color of the suctorial frills was similar to that of the marginal lobes. 



The upper arms are short and for the most part coalesced (figs. 1, 3), 

 so that they seem as a whole as a ring like elevation with eight vertical 

 thickenings (fig. 5). The cross-section of the free portion is oval with 

 the pointed end towards the axis of the body. They are shaped like 

 triangular prisms with winged edges ; but as they are beset with thick 

 and complicated suctorial frills on their whole length, they partake an 

 appearance of cylindrical rods (fig. 1). Each wing of the prism is 

 vertically divided into two secondary wings, and the latter are again 

 subdivided into tertiary wings at many places (figs. 8-r2). 



* R. von Lendenfeld — Uber Coelenteraten der Stidsee. 



