274 



Part III. — Thirteenth Annual Report 



Of 22 ova :— 



1 egg measured 1*845 mm. in diameter. 



1 



j> 



1-867 



j> 



1! 



7 eggs 



}) 



1-89 





>> 



2 „ 



>> 



1-90 



» 



>> 



3 „ 



it 



1-935 



n 



>1 



4 „ 



>) 



1-98 



>> 



II 



2 „ 



>> 



2-025 





Jl 



1 egg 



» 



2-07 



>l 



J> 



1 „ 





2-088 



)> 



>> 



Average size 1'93 mm. 

 M'Intosh and Prince give 1*65-1 -75 mm. as the size of the eggs of the 

 plaice. Fulton found in the ovary of the plaice clear mature ova, 1*65 

 mm. in diameter. Cunningham gives 1 -95 mm. as the diameter of this 



egg- 



TURBOT. 



(Rhombus maximus.) 



A collection of eggs of the turbot were sent to Professor M'Intosh by 

 Mr Dannevig, on June 22nd, 1895. 

 30 eggs were measured. 

 Of these : — 



4 eggs measured 1*035 mm. in diameter. 

 7 „ „ 1*044 „ 



6 „ „ 1 053 „ 



5 „ „ 1-062 „ 



6 „ „ 1-071 „ 



2 a a 1*08 „ „ 

 Average size 1*054 mm. 



According to Fulton, the ripe intraovarian ova of the turbot measured 

 *9-*97 mm. Holt found that the ripe unfertilised ova varied from 

 '99-1-06 mm. in diameter. 



Flounder. 



(Pletwonectes Jlestis.) 



The eggs of the flounder were fertilized by Mr Alex. Greig, St 

 Andrews, on April 2nd, 1894. 

 Of 1 7 eggs from one fish : — 



8 eggs measured -9 mm. in diameter. 



2 



>j 



u 



•909 



>j 



if 



1 



j> 



i) 



•936 



>) 



11 



4 



>> 



)> 



•945 



ii 



J) 



1 



a 



II 



•967 



13 



II 



1 



)t 



» 



•972 



»> 



1) 



Average size -9216 mm. 



Dab. 



(Pleuronectes Umanda.) 



The ova of the dab were fertilized by Mr A. H. Gourlay, St Andrews, 

 on April 12th, 1894. 



