169 
North Sea Investigations. 
(Continued.) 
By 
Ernest W. L. Holt. 
Naturalist on Staff in Charge of Investigations. 
Economic. PAGE 
I. On the Destruction of Immature Fish in the North Sea . 5 Lee 
II. On the Territorial Fishing Grounds of Scarborough and its Neichbanrhood AG 
Scientific. 
Ill. The Blonde (Raia blanda, Holt and Calderwood, MS.), a species SS con- 
founded with &. maculata, Montagu : 5 : 5 luSiIL 
IV. The recessus orbitalis, an accessory visual organ in Pleuronectid Fishes - 185 
V. On an Adult Specimen of the Common Sole with i ae Eyes, with a 
Discussion of its bearing on Ambicoloration . . - 188 
VI. The Reproduction of Caranx trachurus, Linn., the Sead or Hause Mackerel . 190 
VII. Ona Dwarf Variety of the Plaice, with some Remarks on the occasional 
ciliation of the Seales in that species - . 194 
VIII. On some Specimens of Molva abyssorum, Nilss., fear Iceland and Faroe . 199 
I. On tHe Destrucrion or Immature Fiss in tHe Norra Sasa. 
In subjoining the continued results of my statistical inquiries it 
is necessary to occupy but little space with introductory remarks, 
since the question has assumed no new features. The suggestions 
as to size-limits embodied in the draft report of the Parliamen- 
tary Committee would, if carried into effect, leave the North Sea 
fishery practically in statw quo. 
It is true that the proposed size-limits would prohibit the sale of 
some small quantity of fish, of several species, that now finds its way 
into our markets, but the quantity is so far insignificant that its 
exclusion would not materially affect the profits of the vessel. I 
have endeavoured to show that no size-limit that fails to exclude 
from the market so large a proportion of the immature plaice caught 
on the Eastern grounds as to render that area unprofitable, is likely 
NEW SERIES.—VOL. III, NO. IIl. 14 
