DEPTH DISTRIBUTION 



275 



250- 



5D0 



750 



WS97S WS977 WS978 



I0OI-I2Z0hrs 2112-OOIShrs I0I0-I228hrs 



1000 SOUNDING >3000m >iooom 







50 



100 



250 



500- 



750- 



W5 936 



0825-MI8HRS 



1000 



50UNDING_ 



>I0O0m 





 50 



100 



250- 



500 



750- 



WS975 WS977 WS978 



IOOI-I220HRS 2II2-00I9hrs !0I0-I228hrs 



i 



1000 







50 

 100 



2S0- 



500 



750 



SOUNOING > 3000m >I0OOm 



WS986 

 0825-III8HRS 



1000 



S0UNDIN6- 



C. nasotuberculata C. teretivalvata 



Fig. 5. Diagrams constructed as Fig. 4 to illustrate the depth distribution of C. nasotuberculata and C. teretivalvata. 



