RESEARCHES ON RACES OF HERRINGS. 73 
is placed so that its dorsal margin lies parallel to line of measure- 
ment (i.e. line on board upon which snout and mid-caudal ray 
should lie). 
These measurements made, the following are counted :— 
(10) Number of keeled scales on median ventral line in front of base of 
pelvic fins. [This character was found unreliable and was 
omitted. | 
Fic. 1.—Diagram of Herring, showing the measurements, etc., taken by Dr. Orton, 
copied from the figure supplied by the Board of Agriculture and Fisheries. 
(11) Number of keeled scales between base of pelvics and anus. 
(12) Number of rays in right pectoral fin. 
(13) Number of rays in dorsal fin. 
(14) Number of rays in anal fin. 
Then take 
(15) Weight of fish in apparatus supplied + to nearest 10 grms. 
Then 
Take scales { from neighbourhood of pectoral fins and preserve in 
envelopes to be examined by Hjort’s method. 
Then open fish and take 
(16) Sex and degree of maturity (Hjort’s scale). 
* See p. 83. 
+ Each fish was weighed singly to the nearest gram on an ordinary balance in our 
work, 
_ ¥ The scales were forwarded to the Board for examination. The pyloric cw#ca of eac 
fish were also preserved (see p. 86). 
