132 
128 
124 
120 
116 
112 
o 
& 
104 
Py 
aPLERE8 
BP as 
MOP OEP 
6-8 
AM. 
308 University of California Publications in Zoology (Vou. 9 
TABLE 34 
i Summary of table 33 
Day Night 
1. Total number of hauls 111 92 
2. Number of successful hauls 11 17 
3. Total number of hours 85.8 68.3 
4. Number of successful hours 9.6 15.7 
5. Total number of animals 256 3212 
6. Average per hour 3.0 470.2 
7. Haul frequency 10 18 
8. Time frequency 11 23 
| sel 
8-10 10-12 12-2 2-4 4-6 6-8 8-10 10-12 12-2 2-4 4-6 
P.M. AM. 
Fig. 4. Labidocera trispinosa. Variations in numbers per hour at the 
surface according to the time of day. Data in table 33. 
The preponderance at night at the surface is marked (lines 
5 and 6 of table 34). The night frequency is also somewhat 
ereater (lines 7 and 8). The plurimum is reached between 
6 and 8 p.m. (table 33, columns E and F, line 7), but the 
6-8 
