Invertebrata — Mollusoa. 



81 Protozoa 

 .1 Rhizopoda 



...2 Foraminifera 

 .3 Heliozoa 

 .4 Hadiolaria 

 .5 Infusoria 

 .6 Flagellata 

 .7 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 

 .95 Microsporidia 



Cap. XVIII. 59.33 Coelenterata. 



Cap. XIX. 59.34 Spongiae, Porifera. 



84 Spongiae, Porifera 

 .1 Myxospongiae 

 .2 Ceratospongiae 

 .3 Halichondriae, Monactinellida 



34.4 Lithospongiae Tetractinellida 

 .5 Hyalospongiae, Hexactinellida 

 .6 Calcispongiae 



Cap. XX. 59.35—38 Cnidaria. 



85 Cnidaria 

 36 Actinozoa 



.1 Rugosa, Tetraeorallia. 



.2 Alcyonaria, Octocorallia 



.3 Zoantharia, Hexacorallia 



.4 Antipatharia 



.5 Actinaria 



.6 Madreporaria 

 8? Hydrozoa 



37.1 Hydromedusae, Graptolitha 



.2 Siphonophora 



.3 Acalephae 



.4 Calycozoa 



•5 Rhizostornidae 



.6 Marsupialida 



• 7 Discophora 

 88 Ctenophora 



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



