LIST OF ILLUSTRATIONS 



VOL. II 



FIG. PAGE 



714. Balaiioglossus 3 



715. ,, anterior end 4 



716. Ptychodera bahamensis 5 



717. Balanoglossus, development 7 



718. Tornaria 7 



719 * 



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



721. zooid 1O 



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 2$ 



732. Appendicularia, diagram 24 



733. Botryllus violaceus 25 



734. Composite Ascidian, diagram of zooid 25- 



735. Doliolum 2& 



736. Salpa democratica, ventral view 26- 



737. lateral view 27 



738. Pyrosoma 27 



739. part of section 2& 



740. Salpa, lateral view of ganglion 29- 



741. Ascidian, mature egg 31 



742. Development of Clavellina, early stages 3 



743. later 33- 



744. Larva of Ascidia mammillata 35- 



745. Metamorphosis of Ascidian, diagrammatic 36- 



746. Doliolum, tailed larva 38 



747. asexual stage, lateral view 38 



748. dorsal 39 



ix 



