OX A NEW SPECIES OF CORYMORPHA FROM JAPAN. 



161 



simply attached to the filaments. It is, indeed, a very difficult task to 

 trace a bud-bearing filament to the adult hydrocaulus, because of the 

 entangled condition of the delicate filaments. Nevertheless, I was lucky 

 enough to have observed indubitable cases of organic connection ex- 

 isting between the bud and the filament of the mother animal. How- 

 ever, owing to the very delicate nature of the bud-filaments, the buds 

 easily fall off while handling, so that I have not been able to sketch 

 one standing in direct continuity with a filament of the adult. As 

 is the case with ordinary full grown filaments, the greater part of a 

 bud-bearing perisarc is usually nearly quite empty. Sometimes the 

 slender perisarc tube adjoining the bud is seen to give off a few 

 delicate filamentous processes (fig. 6.) and to contain remnants o 

 disintegrated ccenosare in the form of wavy or discontinuous solid 

 cords of varying thickness (fig 7). 



In order to observe the budding in a more conclusive way, I went 

 last April to Abutozaki, where in September 1907 Corymorpha tomo- 

 c/isis was found in abundance. Unfortunately, all my efforts to redis- 

 cover the species were in vain, not coming across even a single specimen. 

 According to the fisherman who accompanied me, Mr. Owatari, 

 Professor of Biology in the Okayama Higher School should have col- 

 lected in July 1908 a large number of specimens of the species at a 

 spot near Kajiko Island and about 7 miles off to east of Tomo. The 

 majority of his specimens were said to have been much smaller than 

 those collected by me before at Abutozaki in the month of September. 

 Kajiko-Island was also visited by me during April last, but an entire 

 day's search ended without bringing a single specimen under observa- 

 tion. After all my experience I am inclined to assume that the hydro- 

 some annually perishes, probably during the winter. 



Should the filamentous appendices on the hydrocaulus of Cory- 

 morpha be homologous with the creeping hydrorhiza of other forms 

 as Torrey asserts the budding from the filaments seems to fall in the 

 I . H. Torrey; The Hydroids of the Pacific Coist of North America, 1902, p. 43 



