PACIFIC TUNICATA OF U.S. NATIONAL MUSEUM 



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Figure 19. — Polyclinid in strobilization (?): a, entire specimen; i, left (?) side of a degenerat- 

 ing zooid (m = branchial aperture (?)); c, dorsal (?) side of 3 mm. thorax; d, piece of 

 postabdomen in strobilization; e, schema showing possible connection between degenerat- 

 ing zooid and pieces of postabdomen in strobilization. 



