APPENDICULARIA OF JAPANESE WATERS. Ö 



niul ventral sides of trunk ;i. niirrow zone ulong the 

 lip; it has a large vertical process at the dorsal middle 

 portion. 



This curious Aj)pendicularian is not rare on our coast. I 

 have found it always among the swarm of Nodiluca, mixed with 

 Fi'ilillaria haplostoma. It can be easily distinguished from other 

 species by the characteristic wavy movement of its long tail. 



This species w-as first described by Fol. Lohmann also found 

 it among the Appendicularia of the Plankton Expedition. His 

 Atlantic specimens differed from Fol's Messina specimens in three 

 points : 1, in the possession of hood ; 2, in the three large 

 glandular dermal cells — two on the right and left and one in 

 the middle of the ventral side of branchial region ; and 3, in the 

 an tero- ventral and postero-dorsal j)Osition of stomach and rectum, 

 which in the Messina specimens are situated right and left. 

 Nevertheless, Lohmann considered his specimens to be of the same 

 species as Fol's. He supposed the difference in the relative position 

 of stomach and rectum to be due either to preservation or to the 

 fact that his specimens were all young. The hood and the three 

 gland cells he assumed to have been overlooked by Fol. 



The Japanese form has a hood but no glandular cells. The 

 stomach and rectum in all my preserved specimens agree as to 

 position with Fol's description. As I did not get young specimens, 

 I can not decide whether the dorso-ventral position of rectum 

 and stomach is caused by preservation or is a larval character ; 

 but from the absence of the glandular cells, I am inclined to 

 believe that our species is different from Lohmann's, but is the same 

 as Fol's. I agree with Lohmann in assuming that Fol had 

 overlooked the presence of hood. 



