1977] 
Randall — Green Lynx Spider 
289 
Figure 2. Technique used to prevent tilting of the egg sac. 
Group II and Group III females tilted their egg sacs 6.4 and 6.1 
days respectively, prior to the emergence of young; both groups 
with a range of 5-8 days. Due to the bowl shape, the egg sacs of 
Group I were tilted throughout development because of their posi- 
tion in plastic vials. 
The young from all three groups emerged from the tilted egg 
sacs at the lowest bowl/ lid juncture of the egg sac (Fig. IB). Group 
I spiderlings opened the egg sac from within. 
At this point in the investigation 15 more egg sacs were taken 
from the laboratory colony. Five egg sacs were taken from the 
females and taped to the underside of a petri dish lid, Fig. 2, thus 
making tilting of the egg sacs impossible. The remaining 10 egg 
sacs were allowed to remain with the females until after the females 
had opened and tilted the egg sacs. After opening and tilting had 
occurred five egg sacs were removed from the female and taped to 
a petri dish lid as described above. The remaining five egg sacs 
were taken from the females and artificially tilted with the opening 
made by the females at the highest point of the tilted egg sacs. 
Young from all 10 untilted egg sacs emerged but not from the 
bowl/ lid juncture as described for Groups I, II and III. Instead 
the young emerged in all directions from the bowl in an average 
28.6 days compared to an average 24.6 days for the opened and 
tilted egg sacs of Groups II and III and the tilted egg sacs of 
Group I. 
The young from the five egg sacs that had been artificially tilted 
with the opening at the highest point emerged from both the lowest 
bowl/ lid juncture and from the opening made by the female. 
