LIST OF ILLUSTRATIONS 



VOL. II 



FIG. PAGE 



714. Balanoglossus ............ 3 



715. anterior end 4 



716. Ptychodera bahamensis 5 



717. Balanoglossus, development 7 



718. Tornaria . 7 



719. . . . 8 



720. Cephalodiscus dodecalophus, gelatinous investment .... 9 



721. zooicl 10 



722. sagittal section 11 



723. Rhabdopleura 12 



724. Ascidia 14 



725. anatomy 15 



726. ,, mesh of branchial sac 16 



727. diagrammatic longitudinal section 17 



728. transverse section 18 



729. ,, dorsal tubercle, ganglion, and associated parts . . . 19 



730. ,, sagittal and transverse sections 20 



731. Oikopleura 23 



732. Appendicularia, diagram 24 



733. Botryllus violaceus 25 



734. Composite Ascidian, diagram of zooid 25 



735. Doliolum 26 



736. Salpa democratica, ventral view 26 



737. ,, lateral view 27 



738. Pyrosoma . 27 



739. ,, part of section 28 



740. Salpa, lateral view of ganglion 29 



741. Ascidian, mature egg 31 



742. Development of Clavellina, early stages 32 



"43. later 33 



744. Larva of Asciclia mammillata 35 



745. Metamorphosis of Ascidian, diagrammatic 36 



746. Doliolum, tailed larva 38 



747. asexual stage, lateral view 38 



748. ,, dorsal ,, 39 



ix 



