of the Fishery Board for Scotland. 



19 



Some of the herrings from Ballantrae Bank were running. 



A number of spents appeared in certain of the samples. Some of these 

 were just spent, while others had spawned some time previously ; this fact 

 was indicated by the condition of the reproductive organs, which were 

 shrunken a little and recovered to some extent. 



If the herrings with developing reproductive organs be combined, we 

 shall have a complete series of ovaries from the immature up to the ripe 

 condition, and having ova from -1 up to 1*3 mm. T assume that the 

 herrings that are just starting to develop with eggs, say, *25 mm. in 

 diameter will spawn in summer. And as some of the herrings are spawning 

 at present, it would seem to prove that spawning must take place con- 

 tinuously from winter to summer. 



Comparatively large eggs are found in small ovaries of fishes 17 to 21 

 cm. in length. Eggs *3 mm. in diameter were found in ovaries 3 and 4 

 mm. broad; eggs "4 mm. in diameter, in ovaries 4-6 mm. broad; eggs 

 *5 mm. in diameter, in ovaries 5-7 mm. broad ; eggs *6 mm. in diameter, 

 in ovaries 7 and 8 mm. broad ; eggs *8 mm. in diameter, in ovaries 9 and 

 10 mm. broad; eggs *9 mm. and upwards in diameter, in ovaries 10— J 7 

 mm. broad. 



Length. 



Range of 

 Weight* 



Weight or 



T"> 1 i_ * 



reproductive 

 Organs.* 



Breadth ot 

 Reproductive 

 Organs, t 



Diameter of 

 Eggs, t 



cm. 



grammes. 



grammes. 



mm. 



mm. 



11 



1 





12 







1, 1-5 



•07 



13 







1-2 



07, 1 



14 







1-1-5 



•1 



15 



22-26 





1-5-2-5 



•1 



16 



23-30 





1-5-3 



•1 



17 



31-35 





2-10 



•15, -3, -4 



18 



31-52 



•5-3 



2-14 



1,3, -4 



19 



39-52 



•8-6 



3-19 



•15, -2, -4, -5, -7-1-1 



20 



47-60 



2-5 



3-17 



•5, -6, -9, 1-0 



21 



62, 68 



1-8-9 



2-18 



•6, -8, 1-1 



22 



62-77 



8, 10 



16, 17 



•9, 1-2 



23 



72-111 



2-24 



3-22 



1-0-1-3 



24 



92-126 



9-32 



17-28 



1-0-1-3 



25 



98-131 



7-27 



18-30 



1-0, 1-1 



26 



110-153 



•5-35 



4-33 



•25, 1-0-1-2 



27 



133-172 



14-35 



18-28 



1-0-1-3 



28 



139-184 



10-36 



17-38 



•9-1-2 



29 



153-203 



10-39 



15-30 



•8-1-2 



30 



163-230 



17-47 



16-30 



1-0-1-2 



31 



213-301 



40-81 



29, 33 





32 



236 



42 



32 





* Herrings from Clyde and West Coast. 



t Herrings from Clyde, West Coast, and East Coast. 



March. 



Clyde.— Campbeltown, off Isle of Ross, 4th March 1908 :— 54 W. Spt., 

 24 to 29 cm. 



Clyde.— Campbeltown, Mouth of Loch, 11th March 1905 :— 2 W. Spr.. 

 F. c?., 24, 26 cm.; 22 W. Spt., 21 to 27 cm. 



