TABLE OF CONTENTS. 



Structure and anatomy — Continued. 



Axial organ 



Central organ 



Cirrus nerves 



Brachial nerves 



Nerves of the division series 



Finer structure of the brachial nerves 



Branching of the axial cord in the arms 



Wandering cells 



Ventral nervous system 



Innervation of the tentacles 



Neurilemma 



Epithelial nerves 



Physiology of the crinoidal nervous system 



Interbrachial muscles 



Epithelial muscles 



Ligaments 



Ligaments in the cirri 



Water-vascular system 



Blood-vasculfir system 



Labial plexus and spongy organ 



Schizoeoele cavities 



Ciliated epithelium of the ambulacral grooves. 



Ciliated sacks ^ 



Ambulacral mucus cells ^ 



Sacculi- 



of Antedon- 



Tentacle papillfe 



Dorsal glands 



Brachial and pinnule cysts 



Genital cord 



Cement secreting cells 



Genital pores of the male 



Spermatogenesis and the spermatozoa- 

 Genital organs of Isometra vivipara.. 

 Genital organs of Notoerinus virilis-. 



Marsupium 



Sexual differentiation 



Spawning season 



Comatella nigra 



Comissia spanosehistum 



Comissia littoralis 



Comactinia meridionalis 



Comanthus japonica 



Comanthns annulata 



Catoptometra ophiura 



Amphimetra spectabilis 



Amphimotra parilis 



Cenometra delicata 



Tropiomet ra macrodiscus 



Tropiometra picta 



Calyptometra lateralis 



Antedon bifida 



Antedon mediterranea 



Antedon adriatica 



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