400 KAMAKICHI KISHINODYE : 



There are different types of pumcl-nctä for the capture of tuunies developed 

 at different parts of our empire. But as I have stated loefore, a type called 

 " daiboami ", developed near Sendai is at present the most advanced one. It 

 resembles in form the madi'ague of the Mediterranean, but in our pound-net 

 the bottom is entirely closed with netting, and there are no dividing walls. The 

 movement of the fish is observed by the boat crew bj' signals from a watch-tower, 

 on a wooden frame-work, erected from the sea-battom, or on a pi'ecipice near by. 

 At the sti'ait of Tsugaru the watchman observes the fish by ti-ansmitted light 

 fi'om the sea, seated under a cover of matting, which partly hangs over 

 the sea, fi'om the side of liis boat. In the Ccxse of the daiboami, the watchman 

 takes his post just opposite the entrance of the poimd. In other more simple 

 cases the watchman is seated in the lx)at at tlie mouth. AMien a school of 

 fish enters the pound, its enti'iince is closed by lifting up the sunken 

 netting, connected with the Iwttom of the net, and the bottom is hauled over 

 from one end to the other, the bunt. The depth of water at the euti'ance of 

 the poimd should te more than 15 m. Effective pound-nets for the tunny ai'e 

 alxint 30 m deep at their entrance. The size of the pound-net generally in 

 use is 430 m in circumference, and ca 150 m in the longer diameter. The 

 mackerel and the common seerfish arc caught in pound nets for Svridn 

 qidnqueradiata or miscellaneous fishes. 



Classification. 



So ill- as I have studied, the natural afiinities oi fishes caai not be iiscer- 

 tained fi'om the examination of external characters only. Some authoi-s classify- 

 the genus Auxis near Scomber, as the two doreals are separated, but in realit)' 

 these two genera are at Iwth exti-emities of tlie phylum of tlie scombroid fishes. 



Order TELEOSTEI. 



Suborder Acanthopterygü. 



Family SCOMBllIDAE (s. sti-.) Günther. 



Soombridae (iu part), (Jiinther, 1860. 

 Seombrinne, Jordan & Evermann, 1896; Stnrks, 1910. 

 Scombridau (in part), Boulengcr, lUOl; Eegan, 1909. 

 Scombridae, Kishinonyc, 1915. 



Body fusiform, and more or less compressed. Head poiute<l at the anterior 



