CHORDATA 
Suborders Genera 
Order ASCIDIACEA 
473 
Species 
(Mostly fixed Tunicata ; single or in colonies ; tests of considerable thickness) 
Motgula 
ASCIDIA SIMPLICES 
(Possess distinct tests ; usually perma- } Cynthia 
nently fixed) . 
Boltenia 
Ascidia 
ASCIDIA COMPOSITE 
(Fixed colonies ; the zodids embeddedina ) Botryllus 
common gelatinous material ; without ) Amaracium 
separate tests) 
M. manhattensis 
) M. petlucida 
M, arenata 
C. pyriformis 
C. partita 
C. carnea 
B. clavata 
A. amphora 
; A. callosa 
B. gouldii 
A. pellucidum 
