21 



Onidaria — Vermes. 



37 



Hydrozoa 



1 Hydromedusae, Graptolitha 

 •2 Siphonophora 

 •3 Acalephae 

 •4 Calycozoa 



37.5 Rhizostomidae 

 .6 Marsupialida 

 .7 Discophora 



38 Ctenophora 



Cap. XXI. 59.39 Echinoderma (incl. Enteropneusta). 



) Echinoderma 



•1 Crinoidea, Pelmatozoa 

 •2 Asterozoa 

 .3 Asteroidea 

 A Ophiuroidea 



•5 Echinoidea 



•6 Holothurioidea 



.7 Pedata, Elasipoda 



.8 Apoda 



.9 Enteropneusta 



Mollusca 



•1 Lamellibranchia 

 •2 Scaphopoda 

 •3 Gastropoda 

 .31 Amphineura 

 .32 Frosobranchia 

 Heteropoda 

 Opisthobranchia 

 Nudibranchia 

 Tectibranchia 



.34 



.36 

 .37 



Cap. XXII. 59.4 Mollusca. 



4.38 Pulmonata 

 .4 Pteropoda 

 .5 Cephalopoda 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 .55 Dibranchia 

 .56 Octopoda 

 .58 Decapoda 



Cap. XXIII. 59.46 MoUuscoidea (Brachiostoma). 

 Cap. XXIV. 59.47 Bryozoa. 



47 Bryozoa 



.1 Gymnolaemata 

 .2 Phylaetolaemata 



47.3 

 .4 



Pterobranchia 

 Entoprocta 

 Phoronis v. 51.76. 



Cap. XXV. 59.48 Brachiopoda. 

 Cap. XXVI. 59.49 Tunicata. 

 49 Tunicata 49.4 Synascidiae 



•1 Ascidiae .5 Pyrosoma 



•2 Copelatae .6 Salpae 



•3 Monascidiae ,7 Doliolum 



Cap. XXVII. 59.5 ARTICULATA. 

 Cap. XXVIII. 59.51 Vermes (incl. Mesozoa, Trichoplax). 



51.33 Acanthocephali 



51 Vermes 



.1 Helminthes, Parasiti ^ 

 .2 Platyhelmintlies 

 .21 Cestodes 

 .22 Trematodes 

 .23 Turbellarii 

 .24 Nemeitini 

 •3 Nematodes 

 •31 Gordiacei 



.35 Chaetognathi 

 .4 Annelida 

 .5 Hirudinea 

 .6 Oligochaeta 

 .7 Polychaeta 

 .74 Gephyrea 

 .76 Phoronis 

 .78 Myzostomum 



* Im allgemeinen. 



