6i 



Specimens of Artificial Pearls Exhibited by Kokichi 



Mikimoto, Miye Prefecture. 



The pearl cultural ground is found in the Oniura gulf^ Na- 

 gasaki prefecture, in the Ago gulf and Gokasho gulf^ Miye pre- 

 fecture. The area of the pearl cultural grounds throughout entire 

 Japan is 18,790 acres with an output of 2,525 lbs. valued at 411, 

 000 yen. The oldest and most successful cultural grounds are 

 those of Mikimoto in the Ago and Gokasho gulfs, Miye prefecture. 

 The annual output ranges from 250,000 yen to 300,000 yen. 

 In these pearl cultural grounds efforts are being made to increase 

 the output of pearls to improve the quality by artificial means. 

 For particulars see models and samples exhibited. 



(5) Models and Drawings of the Biwa I^ke Exhibited 



by Shiga prefecture. 



Biwa lake is located in Shiga prefecture, being one of the 

 largest fresh water lakes in Japan. The area covered is about 

 286 square k.m.s, the output per year being figured at 500, 

 000 yen. The period both for laying of eggs by the principal 

 fish living in the lake and the fishing season are given in the. 

 following; table. 



Species. 



Oncorphyndrus Masow W. 

 Plecoglossus altivelis S. 

 Cyprinus Carpio L. 

 Carassins auratus L. 

 Sarcocheilichthys varigatus S. Higoi 

 Lencogobio Sp. 



Japanese 

 nam J. 



Masu 



Koayu 



Koi 



Funa. 



Spawning Fishing 

 season. season. 



Sept-Oct. June-Dec. 



,, Every season. 



May-June May-July. 



April-June April-Aug. 



May-June May-June. 



Morol^o June-July. ^JJJv.jSc. 



Unagi April-Oct. 



Anguilla Japonica S. 



Ishikawa Steenacheri San. Wataka May-Aug. May- Aug. 



Opsaruchihys Mucirostris San. Hasu June- Aug. June- Aug. 



Lenciscus hakuensis. G. Ugai May-July March-June^ 



