Abstract
Adults of several species of both solitary and colonial ascidians are capable of slow crawling, involving the progressive formation of new attachments and tearing or dissolving the old ones. The ampullae play a leading part. A moving colony may divide into two, or two adjacent colonies may fuse: true fusion has been observed only once, in Trididemnum tenerum. Both Ciona intestinalis and Diplosoma listerianum may metamorphose by attachment to the surface film and are capable of post‐metamorphic attachment to a solid surface for a prolonged period. In such attachment the ampullae play a leading role. A free‐swimming (unattached) colony of Diplosoma takes on the form of a Pyrosoma colony. Such colonies have been reared in the laboratory forming cigar‐shaped, jet‐propelled bodies up to 1 cm. long with as many as fifty zooids.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
