1. 
   Doliolida
   (from the article `tunicate`) ...buds form from a ventral stolon.Order PyrosomidaZooids embedded in a tube open at one end.Order DoliolidaComplex alternation of generations ... ...Small (usually around five millimetres in length, including the tail) and simple, appendicularians do not form colonies....
   Found op http://www.britannica.com/eb/a-z/d/63
   
   
2. 
   Doliolida
   Doliolida are small marine animals of the Tunicata phylum, related to salps and pyrosomas. The Doliolid body is small, typically 1–2 cm long, and barrel-shaped; it features two wide siphons, one at the front and the other at the back end, and eight or nine circular muscle strands reminiscent of b...
   Found op http://en.wikipedia.org/wiki/Doliolida
   
   

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