NEREIS JAI'ONICA. 



Incite and punse 



Time of flood at 



Hour and duration 



Swarming 



of moon. 



night. 



of swarming. 



worms. 



Dec. 15th. 



1 0.0 p.m. 



About II.30 p.m. 



very few 



„ 1 6th, New Moon. 



11.40 p.m. 



* 



* 



„ 17th. 



# 



0.10-2.0 a.m. 



Abundant. 



„ 1 8th. 



0.20 a.m. 



1.0-3.0 a m. 



Abundant. 



igth. 



1.0 a.m. 



about 3.0 a.m. 



Few. 



„ 20th. 



1.45 a.m. 





None. 



In the next following year (1997), Mr. Iwaki of Hachihama kindly 

 undertook to make the observations at my request. For that I beg here 

 to express my thanks to him. He could make observations only in the 

 night of Dec. 20th (the day of full moon). In that night the flood was at 

 1 1.30 p.m. ; and the swarm was thickest at about 1.0 a.m. of the 21st. The 

 night's catch by four boats at station No. 1 amounted to only So tabfuls ; 

 and the total catch at the six stations by sixteen boats, to 277 tabfuls. 

 Adverse circumstances of weather prevented Mr. Iwaki from making 

 further observations on other days in the swarming season. 



In conclusion I beg to offer my thanks to Prof. Ijima for the aid 

 rendered me in the preparation of this paper. 



February iSth, 1908. 



