BY W. R. COLLEDGE. 59 
in October, some were found bearing the winter eggs, and 
these increased rapidly until the majority were of that 
kind. . Then the insects disappeared for nearly five months. 
It seems a peculiar coincidence, that the same changes 
they undergo in colder climates should take place here, 
under such opposite conditions. My own observations 
may be of too limited a nature to form a general conclusion, 
for I have only found them in one place, and in one pool ; 
but the fact is interesting, and doubtless, will help to direct 
attention to them in the future. Unfortunately, their 
entire disappearance has prevented the continuance of my 
observations for the present. 
Measurements of Hyaline Daphnia— Brisbane Species : 
Millimetres. Inches. 
Across Head from beak to occupit 2-9 mm. "116 
Length of Body, excluding Shell-spine Sonn. - 1492 
Length of Shell-spine.. Sic AC 2°x'066 “OSx* 00264 
‘Telson or Caudal Lamina err ne les 052 
Length of Pectinated Claw only 3 79 “036 
Antenne 2°66 “1064 
Bye .. he 3: ad Nr Ae “9 “O36 
Heart Vs oF az a are “43x33 “O172x-° 132 
Mandible .. ie 6 A is -62x°13 “0248x0052 
Jaw as 65 bf Ss Ne 2 “008 
Length of third Branchial Foot we Hea “O44 
Length of Fifth Branchial Foot ak 9 “36 
Length of New Born Daphiia 33 "4x26 -O16x° 0104 
Length without Shell-spine when twelve 
hours’ old... ie ne ye =i 028 
Length of Shell-spine when twelve hours’ 
old) ~~... Ac a se a el “O44 
