PLATE IX. 



Ascidia renosa Miill. (p. 102) 



FIG. 



1. The mantle. 



2. Test and mantle laid open. The tentacles, tentacular 



collar, endostyle (on right), branchial tubercle, oral 

 lamina with gland under nerve-ganglion (opposite 

 br.s.), and mouth, &c., are shown. 



3. Test laid open, showing apertures of mantle, intestine, 



blood vessels leading to test, &c. 



4. Mantle with most of branchial sac laid open. ? , opening 



of female duct. c?, opening of male duct. (The 

 pointer from r.t. is carried in error across the 

 vessel.) 



About two and a half times natural size. 



