Fig. 23. Planktonic Tumcata. 

 1-2, Appendiculata. 3-6, Salps. 7-1 1, Doliolids {Dolioktta gegenbatiri) showing the life history. 



1. Oikopkura dioica. 



2. Fritillaria borcalis. 



3. Thalia democratica; sohtary stage showing the budding stolon {a) which gives rise to a chain 

 of aggregate stages. 



continued opposite 



