4 AKT. 9. — K. KISHINOUYE : 



is found on the abaxial side of the stalk ; it is adapted for 

 adhesion. 



The œsophagus is very short and somewhat quadrangular in 

 shape, with the wall abaxially reflexed ; it is rich in longitudinal 

 folds. The central stomach cavity is long and prismatic. The 

 gastric filaments are simple, long, and numerous, growing thickly 

 in eight adradial rows. 



The genital glands are eight in number. Each of them is 

 of a lanceolate shape, and consists of seven or eight oblong fol- 

 licles. The abaxial side of the gland is black and can be seen 

 through the umbrella. 



Two fine specimens were collected by Dr. K. Yendo in 

 August 1903, in Shimushiri or Shumushu, the most north-eastern 

 island of Chishima (Kurile Islands). The larger specimen meas- 

 ures 15 mm. and the smaller 12 mm. in umbrella-diameter. 



Lucernaridse. 



Haliclustus tenuis^ u. sp. 



(PI. I, Fig. 3.) 



The calyx or umbrella is narrow, gradually expanding 

 towards the umbrella-margin, nearly twice or a little more than 

 twice as high as the breadth. The peduncle is long, quadrate, 

 and four-chambered. In the subumbrella, there are numerous 

 groups of nematocysts. The perradial mesogonian folds have each 

 three or four large groups of same. Many smaller groups of 

 nematocysts are found on the umbrella-margin. 



