List of Tables: Urosalpinx cinerea 



Page 



Table 1 . Height and sex, relationship 27 



Table 2 . Egg production 29 



Table 3 . Egg case production 32 



Table 4. Spawning period, duration of in different latitudes 34 



Table 5 . Incubation period of egg case stages, duration of 38 



Table 6 . Growth rate in English waters 42 



Table 7 . Maximum height in different geographic regions 46 



Table 8 . Rate of destruction of oysters, general 55 



Table 9. Rate of destruction of oysters, related to water 



temperature and drill size 56 



Table 10 . Survival in low salinities, effect of successively 



lower water temperatures 64 



Table 11 . Death rates, effect of low and then high salinity 



at low temperatures 65 



Table 12 . Death rates, effect of temperature and salinity 66 



Table 13. Initiation and cessation of movement, feeding, and 



oviposition, relation to water temperature in 



different geographic regions 82 



Table 14. Initiation of turning over, feeding, and oviposition, 



relation to water temperature in the laboratory 83 



Table 15 . Migration rates in the field 96 



