172 



THREE CEUISES OF THE " BLAKE. 



and when the sea is calm and the circumstances are favorable, 

 these animals are individualized by the greenish, golden, or sil- 



Fig. 63. — Arach- 

 naetis, Embryo of 

 Edwardsia. ^J'-. 



Fig. 64 a. — Strongylocentro- 

 tus Pluteus. Greatly mag- 

 nified. 



Fig. 64. — Asteracanthion Pluteus. 

 Greatly magnified. 



Fig. 66. — Littorina Embryo. 



1_6 

 1 • 



Fig. 6-5. — Cyplionautes, Embryo of 

 Bryozoon. Greatly magnified. 



Fig. 67. — Embryo of Loligo. -\0-. 



very light which betrays their presence, and defines their out- 

 lines, while it illuminates the sea itself. On tempestuous nights, 

 the phosphorescence, intensified by the motion of the water, adds 



