PROGRESS IN BIOLOGICAL INQUIRIES, 1926 609 
APRIL 16 TO MAY 20,1926 
SOUTH OF CAPE Cop 
2620 MACKEREL 
PER CENT 
uu oh 
MAr7 
nN 
° 
May 30 To JDNE 15,1926 
Fire 1. Guiry of MANE & CAPE SHORE 
2180 MACKEREL 
PER CENT 
“nu on 
JUNE 10 
JUNE 12 To JvW 13,1926 
Brock 1. & GULF OF MAINE 
3800 TIACKEREL 
PER CENT 
ut S 
Sury 2 
JULY 11 10 Aus. 6, 1926 
GULF OF MAINE 
1460 MACKEREL 
z 
Vv 
ig 
o 
Jory 24 
AUG. 8 10 28,1926 
GULF OF MAINE 
2440 MACKEREL 
— 
ta] 
PER CENT 
te) 
al 
Ave.\7 
nN 
(9) 
BROKEN LINE: Soup LINE: 
ANS. 20 To SEPT. 25.1925 AvuG.29 To SEPT. 25,1926) 
GULF OF MAINE GULF OF MAINE 
3528 MACKERE) O60 MACKEREL 
PER CENT 
aes 
ui 
SEPT.S 
ores: TO 0cT.9 19 Se Ne: 
. 29 TO OCT. 25 
GULT OF my AINE W385 MAKL SEPT. 1 TO OCT.13,1926 
‘D 
Oct.970 28 1925 Brock 1. Gurr Or MANE 
745 MACKEREL TAZO MACKEREL 
SEPT.30 - —— = 
PER CENT 
BROKEN LINE: Souv LNE: 
Oct. 15 TO Nov. 11.1925  OCT.27 TO NOV.28,1926 
GULF OF MAINE GULF OF MAINE 
1508 MACKEREL \680 MACKEREL 

PER CENT 
uu 5 

Scr 7 = a 
3s AS AO 
LENGTH , CENTIMETERS 
Fig. 17.—Frequency distributions of sizes (length from snout to middle rays of 
caudal fin) of mackerel during the seasons of 1925 and 1926 
66552—27. 7 

