APPENDrCÜLAKTA OF JAPANESE WATEKS. 23 



trunk, had a tail of lo23,.5 /^ lengtli ; the trunk in this specimen 

 must have been at least 3781 n long by estimation. 



lieinarJk's on tJie occurrence of Appendicularia 

 hi ffajxinese ivaters. 



The most common species on our Pacific coast are Oik. 

 longicauda, Oik. dioica and Oik. fusiformis. These are found 

 almost in all seasons and in every part of the coast. As they 

 have been all recorded from the coast of Chili, a very wide range 

 of distribution should be attributed to them in the northern as 

 well as the southern Pacific. 



Koinrxlevskia tenuis and Frittillaria haplostoma are also com- 

 mon visitors to the Pacific coast of Japan. They are both found 

 during summer in the swarm of Noetiluca, and when this dis- 

 appears, they disappear also. 



Frit. 2^&ttucida always accompanies Frit, haplostoma, but is 

 far less abundnnt than this species. 



Oik. rufescens and Stegosoma magmim occur among the 

 oceanic plankton organisms that approach our coast in mid-summer 

 and early autumn. Once in the summer of 1897, to my own 

 experience, an exceptionally great swarm of Oik. rufescens invaded 

 the harbour of Misaki after a strong southern wind, thickly 

 becrowding the surface water all over with the cast-off " houses. " 



Oik. megastoma is a rare species. It occurs simultaneously 

 with Stegosoma magnum. Of Oik. microstoma I have obtained only 

 two specimens, and of Oik. cornutogastra a single specimen in 

 the Misaki harbour. Of Frit. Ritteri, two specimens were all 

 that I obtained on the western coast of Kiushu. All these species 

 therefore seem to be quite rare in the Japanese waters. 



