6 
the summer of 1920 on August 24, and it had the proportions 4.1, 3.3, and 2.8. 
A fisherman at Point Pelee has stated that he recalled having seen during one 
spring rather large numbers of small longjaws. taken in the pound nets in that 
region. This would indicate a migration occurring during the winter or spring 
months when temperature conditions would be rather uniform throughout the 
lake. 
The longjaws examined at Dunnville and Port Dover early in November, 
1920, were almost ready to spawn. Typically, members of the subgenus Cisco 
(Jordan and Evermann) are said to spawn in late summer but it would not be 
surprising to find the deep water forms in the shallower, warmer waters of Lake 
Erie spawning later than those in the other Great Lakes, especially in a mild 
fall such as occurred in 1920. Two females of L. johannae received from Wiarton, 
Georgian Bay, November 24, 1920, were found not to have spawned. 
The following table shows comparative measurements of certain characters 
of the longjaws in Lake Erie. Measurements are given in decimal fractions 
of body length. 
PORT MAITLAND PORT DOVER 
1082 | 1042 | 1037 919 | 907 | 918 
Tt oan Seth pee 26 25 235 245] 25° ee 23 | 23. 24 
Se Bee ees Ae ace ree 24 1 92 | als | eu 26 .30 
CP. Pirin. eet eos “087 078 081 “082 082 089 “084 079 “082 
pee Ree: cass coat Stren eT “054 058 060) 06 06 055 066 055 065 
Snout . bones de Sh 063] .063) .064 063 063) .057)| . 058 053 058 
Pe ee i Re “085 . 083 09 .08 087 “085 079 08 089 
SPEER ett ee ae at a7 a7 avs qT Ne 16 166 ase 173 
Fes le rs A be 45 | 16 ie 41 | 41 ; 152 ist 45 41 
ee ee eae ‘lao [4.0 |h0 lao laa lla 43 lan 
Deptt Pdi oat pt ne ene ? Reels 44 3.9 3.3 
CP. Gepeh inspeadise = ay oe ee 3.9 |3.2 Is io \3.0 lo7 ; 28 '3.0 2.9 
(5) L. harengus (Richardson). Georgian Bay cisco. 
A few individuals were taken which agreed in measurements and description 
with the Georgian Bay cisco. Jordan and Evermann report this species in 
Lake Erie and no doubt it occurs in small numbers. 
For purposes of comparison and for confirmation of the value of proportional 
measurements, specimens of L. ontariensis were obtained from Port Credit on 
Lake Ontario,.and specimens of L. harengus from Wiarton and Midland on 
78 
