LIST OF ILLUSTRATIONS 



705. 



706. 



707. 



708. 



709. 



710. 



711. 



712. 



713. 



714. 



715. 



716. 



717. 



718. 



7W. 



720. 



721. 



722. 



723. 



724. 



725. 



726. 



727. 



728. 



729. 



730. 



731. 



732. 



733. 



734. 



735. 



736. 



737. 



738. 



739. 



740. 



Balaiioglossus 



,, anterior ciid 



Ptychodera bahanieiisis 

 Balaiioglossus, duvelopineiit 

 Tornaria .... 



Cephalodiscus, gelatinous investment 

 ,, zooid .... 



,, sagittal section 



Rhabdopleura 



Ascidia 



,, anatomy 



,, mesh of branchial sac 



,, diagrammatic longitudinal section 



,, transverse section 



,, dorsal tubercle, ganglion, and associated par 



,, .sagittal and transverse sections 



Appendicularia 



,, diagram 



Botryllus violaceus .... 



Composite Ascidian, diagram of zooid 



Doliolum 



Salpa democratica, ventral view . 



,, lateral view 



Pyrosoma 



,, part of section 



Salpa, lateral view of ganglion 

 Ascidian, mature egg .... 

 Development of Clavellina, early stages 



» ) , , later , , 



Larva of Ascidia mammillata 

 MftanKirphosis of A.scidian, diagrammatic 

 Doliolum, tailed larva .... 

 ,, asexual stage, lateral \ iew 



dorsal ,, 

 Salpa, late stage in development 



ts 



I'AOE 



3 

 4 



5 



7 



8 



•t 



10 



II 



12 



13 



l."> 



l(i 



17 



IS 



r.t 



20 

 21 

 24 

 25 

 25 

 26 

 27 

 28 

 28 

 29 

 29 

 31 

 32 

 33 

 35 

 37 

 38 

 39 

 40 

 4(J 

 41 



