LIST OF ILLUSTRATIONS 



FIG. PAGE 



HIS , - 2 



664. Balanojossi 



665. ,, anterior end .4 



666. ,, development 5 



667. Tornaria 6 



668. 6 



669. Cephalodiscus, gelatinous investment 7 



670. ,, zooid 



671. ,, sagittal section ... ... 



672. Rhabdopleura 10 



673. Ascidia 



674. ,, anatomy 13 



675. ,, mesh of branchial sac 14 



676. ,, diagrammatic longitudinal section 15 



677. ,, transverse section 16 



678. ,, hypophysis, ganglion, and associated parts .... 17 



679. Appendicularia . 21 



680. ,, diagram . 21 



681. Botryllus violaceus 22 



682. Composite Ascidian, diagram of zooid 23 



683. Doliolum . 24 



684. Salpa clemocratica, ventral view 24 



685. ,, lateral view . . . .24 



686. Pyrosoma . 25 



687. ,, part of section . 25 



688. Development of Clavellina, early stages 



689. ,, ,, later ,, . . 30 



690. Larva of Ascidia mammillata 31 



691. Metamorphosis of Ascidian, diagrammatic 33 



692. Doliolum, tailed larva 34 



693. ,, asexual stage, lateral view ..... .34 



694. ,, ,, ,, dorsal ,, 35 



695. Salpa, late stage of development 36 



Amphioxus laiiceolatus 39 



