350 rniversitij of Cnlifornia Puhlicatiops in Zoology. [Vol.8 



B 



Fig. A. Self-closing water-bucket set for lowering, with lid and cylin- 

 der suspended by two clutches held in place by springs to the headpiece. 

 Detachable messenger in descent just above the clutches. Key-faucet 

 removed from outlet. X Ho- 



Fig. B. The bucket after closure, lid and cylinder held in place by 

 snap locks in standards. Messenger resting on rubber buffer. The hinged 

 arm with turn-button below (above in figure), which closes the slot 

 through which the cable is passed to the axis of the apparatus, is with- 

 drawn and thrown outward. The cable eye is shown on the steel bolt 

 which carries the weight of the apparatus. Key-faucet in place for 

 emptying the contents. X ^io- 



