SOME MEDUS/E OF JAPANESE WATERS. 



21 



The thickened border of the ostia becomes confluent with the 

 perradial ridges of oral tube on the axial side. Therefore, the 

 contour of the ostia is not definite on that side. 



I have found this species in a large number in Jane 1907, 

 in a haul of a shrimp-trawl in the Bay of Toyama from a depth 

 of about 130 metres. I was told by fishermen that they never 

 find this species on the surface of sea. 



A good sized specimen measures 160 mm. in diameter. 



The entire animal is colorless and nearly transparent. 



JPhacellophora anibiguaf (Brandt) ? 



The umbrella is flat, disc-shaped. The exumbrella is granu- 

 lated. The umbrella-margin is provided with sixteen sensory 

 clubs, and is divided into forty-eight lobes. The ocular lobes 

 are narrow, pointed, and diverge from the sensory club. The 

 sixteen velar lobes are broad and nearly triangular in shape. On 

 the oral side of each velar lobe, there are about nine ten- 

 tacles in one row, running a little removed from the umbrella- 

 margin. Fig- 2. 



Each ocular canal gives off 

 from two to four lateral branches 

 on each side, and there are three 

 to five simple canals between every 

 two ocular canals. 



This species is sometimes 



found in winter near Misaki and 



even in the Bay of Suruga. I have 



collected it on the eastern coast of „, ^-.^ 7 ^ ; -^ ? 



rliaccUoplwra ambigua / 



Poromushiri in November 1904. Natural size. 



