To which should be added the folloT,ving other reports of hooks 

 found in previous years? 



Taokle 



1912 1 hook 

 1924 1 hook 

 19— 1 hook 



Origin 



Tarifa 

 Azores 



Malaga 



Place of Recovery 



Puglia (Gallipoli) 

 Sardinia (isola Plana) 

 Algeria (Arzeu) 



I owe the identification of the two hooks from the Azores (certain^ 

 at least, for one of them) to Major J. Agostinho, Director of the Meteoro- 

 logical Service of the Azores , who made an accurate investigation in the 

 islands concerning these hooks with their typical method of tying, which 

 it has not been possible to find anywhere elsei and I owe to Br, Ove H8eg, 

 who took charge personally of the researches in Norway, the recovery of 

 the North Spanish hook in the Oslofjord„ 



To Mr. Karekin Devedjian, I owe the certain identification of 

 the leads from Constantinopleo 



In the last few years there has taken place, in respect to the 

 type, a change in the frequency of the Spanish hooks found in the 

 Mediterranean. While earlier the hooks from Tarifa (near the Strait of 

 Gibraltar) were most frequent, now these have become rare and there 

 arrive instead with relative frequency hooks for tuna and "bonito," 

 employed by the Spaniards in Spanish waters; and this is related to 

 the fact that the hook and line fishery for tuna at Tarifa has decayed „ 

 while that for the "bonito" in the Gulf of Gascony has had a great 

 developmento We have here an indirect proof which confirms the real 

 origin of the hooks which are foundc 



Another proof of the continual movements of tuna is in the scarcity 

 of discoveries of local hooks in the tuna captured in the same places, 

 or in the vicinity of the places where such hooks are employed, except where 

 there is an immediate connection in time and in the direction followed 

 by the tuna, as I will show in speaking of the Sicilian fisheries for 

 returning tuna. 



These discoveries, while they furnish a secure basis for the primary 

 conclusions, also permit of extension and the giving of a more general 

 interpretation of the phenomenon of the migrations of the tuna. 



1 ) The tuna , in the Me-i.terranean , cannot be separated into 

 autochthonous groups , corresponding to different basins o — There occurs 

 a continuous exchange of tuna from one point to anothero Naturally this 

 does not preclude the schools' remaining for a certain time in a given 

 sea, and therefore one may speak in a relative sense of sedentariness. 

 Let us take for example the Adriatico The operation of the tuna traps 

 there shows the movements which the tuna make,, The tuna commence coming 

 from the south and from the offshore waters to the east coaet of the 



