592 



INDEX TO THE WOODCUTS. 



No. 

 xi. 



xviii. 



xlv. 



xliii, 

 xiii. 

 xii. 

 xix. 



i. 



ii. 

 ix. 

 vi. 



f.xanyiion, nervous 



Ditto, supposed, in stem 



Homologies of Phylactolo'- 1 

 mata, Rhahdopleura, and > 

 Lamellibrancli | 



Laiva, ideal primitive form of. 



Muscular fibre, striated 



Muscles — great retractors . . . . 



Ova in young zooeciiuu of ) 

 FarreUa j 



Polypide, plan of (exserted) . , 



Ditto, ditto (retracted) 



Ditto of Bowerbankia 



Ditto of L'uffuki plunwsa 



Ditto of Bccmia mirahilis . . . . 



After NiTscuE . . 

 T. H 



After Ray Lan- 

 KESTER 



xlvi. Ditto of FarreUa, retracted 



\ 

 \ 

 xi V. Stem of Bowerhanhia. — Sept um. 



XV. Ditto, Otenostomatous, with j^ 

 endosarc j 



xli. Vibraculum. — Scrupocellaria \ 



scrupo&a | 



xliv. Zocecium, young, of Mucro- 

 nella 



xlii. Ditto, shortly after the fixa- 

 tion of the larva 



After Barrois 

 After NxTSCHE 

 T. H 



After JoLiET . 



T. TI. 

 T. H. 

 T. H. 

 T. II. 



T. II. 



After Van 



Beneden 

 After JoLiET 



Page _ 



xxviii 

 xliv 



cxi 



ci 

 xxxi 



XXX 



xlviii 



iv 



vi 



xxiii 



xix 



xxi 



opposite p. i 



After Reichert 

 After Smitt . . 



T. II 



After Barrois 



xxxvi 



XXXVll 



kxx 



cv 



xcvni 



GENERAL TEXT. 



30. Anyuinellu palinaia ^Ifter Van Beneden. 



4. Beania mirahilis. Single zocecium.. T. II 



1. Bicdlaria (Australian) : . . . . T. H 



5. „ ciliafa. Primary cell .... T. II 



2. BugulaMurrayana. Single zocecium T. II 



28. Buskia nitens T. II 



20. Cellepora. CoLjny of T. H 



1 9. Celleporella lepralioides After Alder 



21. Crisia eburnea T. H 



22. „ „ Structure of ocecium After Smitt 



3o. Ctenostome cell After Reichert . . . 



29. Cylindrcecium pusilhyn T. H 



3. Diachoris spiriir/era T. H 



24, Dias/opora Sarniensis. Gonocyst, . T. II 



540 



66 



64 



68 



65 



533 



415 



414 



416 



418 



562 



538 



65 



461 



