SUBJECT INDEX 

 (to Part I only) 



Abyss, 123 



N-acetylglucosamine, 122 



Adhesive organs, 17 



Adhesive papillae, see Papillae 



Alimentary canal, see Gut 



Amino acids, 87 



Ampulla, epidermal of coelomoduct, 67, 68, 



69 

 Anastomosing duct of coelomoducts, 68 

 Anatomy, external, 8-31 

 Ancestral forms, hypothetical, 8 

 Annelids, resemblance to, 8 

 Annuli, see Girdles 

 Anus, 79, 113, 116 

 Apodemes of plaques, 48 

 Archenteron, 108, 110, 118 

 Arms, see Tentacles 

 Attachment organs, 17 

 Auricular lobes, 14 



Basement membrane, 32, 37, 38, 42, 44 

 Basement membrane, of papillae, 45, 46, 49 

 Basement membrane, of splanchopleural 



pleats, 66 

 Bathymetric distribution, 123, 127 

 Blastocoele, 108 

 Blood, 10, 77 



Blood, circulation of, 63, 77, 78 

 Blood-vascular system, 71-78 

 Blood vessel, dorsal and excretion, 45, 60, 



67, 68, 71, 94 

 Blood vessel, median cephalic and excretion, 



68 

 Blood vessel, ventral, 45, 72-73 

 Blood vessels, 10, 63, 71-73 

 Blood vessels, afferent and efferent, of 



tentacles, 73 



Blood vessels, anastomosing plexus of 



cephalic lobe, 71 

 Blood vessels, cephalic, 62, 71 

 Blood vessels, lateral, 72 

 Blood vessels, lateral cephalic, 63, 68 



Blood vessels, musculature, of, 73 



Blood vessels, ovarian, 72, 99 



Blood vessels, of splanchnopleura, 66 



Body fluids, regulation, 69 



Brachia, see Tentacles 



Brain, 7, 50, 57 



Brain, histology, 50 



Bridle, 58 



Bridle, function, 13-14, 42-43 



Bridle, embryogenesis, 116 



Bridle, keels of, 35-36 



Bridle, musculature, 42 



Bridle, structure, 13-14 



Bristles, embryonic, 112, 113-114, 116, 119 



Bristles, function, 117 



Bristles, toothed, 19, 36-38, 44-45, and 



see Platelets, toothed 

 Bristles, toothed, musculature of, 37 

 Budding, 90 



Capillaries of pinnules, 73, 80 



Cephalic lobe, 7, 11,12,50 



Cephalic lobe, blood circulation, 63 



Cephalic lobe, coelom of, 62 



Cephalic lobe, epidermis, 32 



Cephalic lobe, musculature, 44, 63 



Cephalic shield, 1 1 



Chemo-receptors, 58 



Chitin, 6 



Chitin of tube, 122 



Chloragogenous cells, 64 



Cilia, 33 



Ciliated band, anterior, 112, 116 



Ciliated band, dorsal, 7, 18, 32, 33, 53, 117 



Ciliated band, dorsal, sensory function, 58 



Ciliated band, posterior, 112 



Ciliated girdle, posterior, 116 



Ciliated girdles, function, 117 



Circulation of blood, 63 



Circulatory system, 59 



Circulatory vessels, see Blood vessels 



Circulation of blood, see Blood 



475 



