22 ART. 9. K. KISHINOUYE 



Aurelia limhata, Brandt. 



The umbrella is shallow, cap-shaped, and somewhat contracted 

 at the margin. The sixteen marginal lobes or ephyra-lobes are 

 very short and broad and arc separated by shallow notches, of 

 which the adradially situated are especially shallow. The ex- 

 umbrella is very finely granulated. The gelatinous substance of the 

 umbrella is thick in the centre and gradually becomes thin towards 

 the margin. The central knob, hanging down from the upper 

 wall of the stomach cavity, is low and triangular, as seen in the 

 longitudinal section. 



The subgenital pore is comparatively large, being of about 

 one-third the diameter of the subgenital cavity. 



The meshwork of the vascular system is complicated and very 

 fine near the umbrella-margin. In each genital bay, there are 

 from three to nine canals, i. e. one branching ititerradial, two simple 

 adradial, and between these from two to six branching canals. 



The oral arms are nearly as long as the umbrella-radius. 

 Their proximal part is broad, thick and twisted. There is a 

 narrow horizontal ridge between the oral tube and the oral arms. 



The largest specimen before me measures 150 mm. in diameter 

 and about 60 mm. in height. 



Young specimens are pale yellow or pinkish in color, while 

 old specimens are brownish and their tentacles nearly black. 



I have collected several young specimens on the east coast of 

 Poromushiri in November 1904. Prof. Ijima's party collected this 

 species at Chippesani, Saghalin, in August 1906. Further Mr. 

 H. Kato obtained a large specimen off the south-eastern coast of 

 Poromushiri ill September 1908. 



