aye 
forwarding for examination as well as the amicable settlement 
of various differences of opinion which arose in the course 
of the operations have been amongst the duties which he has 
successfully undertaken. 
Much assistance has been rendered by the co-operation of 
the anglers, though the netting operations were naturally 
somewhat distasteful to them. The netters faithfully per- 
formed their part of the programme agreed upon. 
Thanks are due to Mr. Arthur Green, photographer, Port 
Elizabeth, who generously took a number of photographs. 
The plan of the Zwartkops River accompanying this report, 
and which shows the various “ spruits’”’ in which netting is 
usually carried out, is reproduced from one drawn up by 
Mr. W. S. Stead from original observations which he made 
in connection with this enquiry. He adds the following 
explanatory remarks :—*‘ The area at the mouth of the river 
is a banking of sand, which extends to as far as the mouth of 
the Bristol Channel; from this point upwards, including 
the river islands, there is marshy land with river grass. 
Bordering on the south of Modder Spruit there is also marshy 
land with river grass. From the Bridge to Riverside there is 
mainly land covered, like the islands, by water at high tide. 
From Riverside to Red House the river is banked to a height 
of 6 feet by river deposit. From Red House to Perseverance 
the banks are from 6 feet to Io feet high. Hills about 300 feet 
high—a cretaceous deposit—touch the river at Tipper’s Creek, 
Riverside and Picnic Bend, and from there extend to 
Uitenhage.” 
DETAILS OF EXPERIMENTAL NETTINGS. 
The nettings are numbered consecutively, the date and 
locality of each being given. The number and kinds of fish 
follow, with the length in inches, and weight. Remarks, when 
necessary, are added as to stomach contents and maturity of 
the fish. 
Nos t-—Modder Spruit.y 27th jume, rors. 





No. Kind. Length. Weight. Remarks. 
I | Springer ee een .. | 5¢lbs. .. | Ovaries fairly well developed. 
269 pe a= TAT. -- —_ 
12 | Mullet -$ | 124—10 in. = —- 
Piipsveenoras =... | 44 in. 7 (o4lpsau | vvell-developed roe of £6) oz. 
14 i ee —2Osiny 2.9 — Not spawning. 
108 Bis eh e202 ate. ae Average size 16 1n., not mature. 
9 | Kabeljauw .. — — — 
ie LE ek eae ai — - 
6 | Leerfish - — 
t | Porcupine Fish -—- 



[crac lols, 

