670 



THE INVERTEBRATA 



at. 



[fr— 



- hrn. 



m.- 



A 



Wm 



-S'OP' 



—An. 



■inL 



■St. 



m 



—slk. 



Fig. 468. Ciona intestinalis. From Shipley and MacBride. The live animal 

 seen in its test ; some of the organs can be seen, as the test is semitransparent 

 S« anu ; at. Atrial onfice; hrn. bram; g. reproductive organs; S-oPj-n^f 

 Openings; int. intestine; M. mouth; m. muscles; pph peripharyngeal ring, 

 St. stomach; stk. stalk attached to a rock; ten. tentacular ring. 



