luvertebrata — Mollusca. 



31 Protozoa 

 ,1 Rhizopoda 

 .2 Foraminifera 

 .3 Heliozoa 

 .4 Radiolaria 

 .5 Infusoria 

 .6 Flagellata 

 ,1 Ciliata 



Cap. XVI. 59.2 INVERTEBRATA. 



Cap. XVII. 59.31 Protozoa. 



31.75 Suctoria 

 .9 Sporozoa 

 .91 Gregarinidae 

 .92 Coccidia 

 .926 Haematozoa 

 .93 Sarcosporidia 

 .94 Myxosporidia 

 .96 Microsporidia 



Cap. XVIII. 59.33 Coelenterata. 

 Cap. XIX. 59.34 Spongiae, Porifera. 



34 Spongiae, Porifera 

 .1 Myxospongiae 

 .2 Ceratospongiae 

 .3 Halichondriae, Monactinellida 



34.4 Lithospongiae Tetractinellida 

 .5 Hyalospongiae, Hexactinellida 

 •6 Calcispongiae 



Cap. XX. 59.35—38 Cnidaria. 



35 Cnidaria 

 3U Actiuozoa 



.1 Rugosa, Tetracorallia. 



.2 Alcyonaria, Octocorallia 



,3 Zoantharia, Hexacorallia 



,4 Antipatharia 



.5 Actinaria 



.6 Madreporaria 

 37 Uydrozoa 



37.1 Hydromedusae, Graptolitha 



,2 SiphoDophora 



.3 Acalephae 



.4 Calycozoa 



.5 Rhizostomidae 



.6 Marsupialida 



• 7 Discophora 

 38 Ctenophora 



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



39 Echinoderma 



.1 Crinoidea, Pelmatozoa 

 .2 Asterozoa 

 .3 Asteroidea 

 .4 Ophiuroidea 



Cap. XXII. 59.4 



4 Mollnsca I 



.1 Lamellibranchia 

 .2 Scaphopoda 

 .3 Gastropoda 

 .31 Amphineura 

 .32 Prosobranchia 

 .34 Heteropoda 

 .35 Opisthobranchia 

 .3() Nudibranchia 

 .37 Tectibranchia 



