11 
!). Plaice ... 
[Sp. gr. 1025 Temp. 30" F.] 
I A few eggs only developed, 
I an embryo reaching across 
i yolk sac in 9 days. In both 
i cases the embryo then died. 
I Milt not quite so ripe as 
in “8.” 
20th March . 
Fertilized. Embryo reached 
across yolk sac in 7 days, 
and then died. Very few 
failed to fertilize out of a 
large number of eggs. 
21st March. 
10. Cod ... 1 day or less ... 1 day 
10a. ,, ... i, ... »» 
11. Haddock 
12. Plaice 
[Sp. gr. 1026 Temp. 40’ F.] 
12 hours ... 12 hours .. Failed to fertilize 
not quite ripe 
6 to 12 hours 
6 to 12 hours 
Only 4 eggs fertilized, and 
formed embryo reaching 
across yolk sac in 8 days. 
Made very slow growth 
thereafter. In 5 days more 
the tail only got round to 
' ventral side of yolk sac. 
In all these cases (1 to 12), the fish were obtained on the Fish 
Quay, at North Shields. 
The following were obtained from a trawler at Shields, from 
ripe fish fertilized in a recent state at sea. 
2'drd March. 
13. Haddock .. 
living 
... living but 
not quite 
ripe 
A large number floating, 
but only 4 fertilized and 
developed. 
13a. 
>1 ••• M ' 
[Sp. gr. 1025 Temp. 40’ F.] 
>» 
[Only 4 fertilized and de- 
I veloped; rest mostly unripe, 
J and never rose from bot- 
tom of box. 
14. Plaice 
26f/i March. 
... (1 to 12 hours ... 6 to 12 hours. 
Milt was found to Still living but 
be dead in many naturally only to 
of the males. the extent of 
making a feeble 
perhaps invol- 
untary sign of 
life. 
/Nine experiments were 
made with material got at 
the quay, and only in one 
in which the spermatozoa 
■l were found to be still alive 
1 did fertilization and de- 
I velopment occur, and that 
(only in a small proportion 
\(some 12) of the ova taken. 
21th March. 
Mr. Godfrey Hastings was good enough to go out in one of Mr. 
liastie's boats, and with the same fish fertilized at successive 
intervals, brought in material furnishing the following results. 
The fertilization was done on the 26th March. 
