of the Fishery Board for Scotland. 



45 



West Coast. — Off Ireland, 31st October, 1907 : — (These herrings were in 

 formaline for some time before they were examined.) 7 Aut. Spr. F., 30 

 to 33 cm. : eggs, *9 mm. : o, 28, 30 mm. : t, 27, 30 mm. : fat, some, none ; 

 5 W. Spr., 29 to 33 cm. : eggs, -7, -8 mm. : o, 20-23 mm. : fat, large 

 quantity, some. All except one had empty stomachs. 



East Coast. — Moray Firth, October 1904; — (These herrings had been 

 in alcohol). 5 Imm., 10, 12 cm. : fat, a little ; 1 W. Spr. (? Imm. dev.) tf, 

 20 cm. : t, 3 mm. : fat, a little. 



Summary. 



Imm. — 19 to 24 cm. ; eggs, -15 mm. : o, 2, 3 mm. ; t, 2 mm. : fat, large 

 quantity, some. 



Imm. Dev. — 19 to 24 cm. ; eggs, -2-4, *7 mm. : o, 3 - 10 mm. : t, 

 3-15 mm. ; fat, large quantity, a little. 



W. Spr.— 20 to 33 cm. : eggs, -35 - -9 mm. : o, 5 - 26 mm. : t, 10 - 24 mm. : 

 fat, large quantity, none. 



Aut. Spr.— 23 to 33 cm.: eggs, 1*0, 1*35 mm.: 0, 20-30 mm.: 

 t, 20-35 mm. : fat, large quantity, none. 



S. Spt. J. — 27 cm. : fat, none. 



Taking the herrings all together, we have a complete series of develop- 

 ment of the reproductive organs from the immature to the nearly ripe. 



The winter spawners consist of last winter's spents and also of herrings 

 that are preparing to spawn for the first time The autumn spawners 

 act as the advance-guard of the winter spawners, while the immature 

 developing herrings bring up the rear. The immature herrings having 

 eggs *15 mm. might possibly be included with the immature developing. 

 Will they spawn during the winter ? 



One male 25 cm. long appeared to have been a winter spent. The testis 

 was 10 mm. broad. Its tissue had a distinct sponge-like honeycomb 

 structure. On teazing a portion in water a white powdery material was 

 washed out. The testis was filling up and had a somewhat solid con- 

 sistency. There was a large quantity of fat present. 



The herrings from Ardlamont, both immature and winter spawners, 

 were firm in the abdomen ; they had a large quantity of abdominal fat. 



The large full herrings got off the north coast of Ireland are similar to 

 the large herrings of Loch Fyne. 



Herrings from Clyde and North of Ireland. 



Length. 



Range of 

 Weight. 



Weight of 

 Reproductive 

 Organs. 



Breadth of 

 Reproductive 

 Organs. 



Diameter of 

 Eggs- 



cm. 



grammes. 



gr amines. 



mm. 



mm. 



19 



50-61 



•2, -3 



3-5 



•25 



20 



55-72 



•1, -2 



2-5 



•2, -25 



21 



62-88 



•1-2-5 



2-12 



15— 5 



22 



• 69-102 



•3-75 



4-17 



•2--6 



23 



86-117 



•2-11 



4-20 



•25-7 



24 



99-137 



1-11 



5-20 



•4--7 



25 



116-146 



1-11 



10-23 



•4--7 



26 



120-170 



1-18 



8-25 



•4--8 



27 



107-186 



6-23 



12-25 



•6--9 



28 



183-227 



11-27 



20-25 



•8 



29 



189, 198 



8, 17 



16-28 



•6, -7 



30 



248-321 



8-43 



15-35 



•5--9 



31 



274-334 



14-39 



15-33 



•5 — -9 



32 



240-331 



9-47 



16-33 



•4, -6, -9, 1-0,1-35 



33 



339, 377 



48, 53 



20-35 



•8, 1-0 



D 



