Invertebrata — Mollusca. 



81 Protozoa 

 .1 Rhizopoda 

 •2 Foraminifera 

 •3 Heliozoa 

 •4 Hadiolaria 

 .5 Infusoria 

 .6 Flagellata 

 •7 Ciliata 



Cap. XVI. 59.2 INVERTEBEATA. 



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, Forifera. 



34 Spougiae, Porifera 

 .1 Myxospongiae 

 .2 Ceratospongiae 

 .3 Halichondriae, Monactinellida 



34.4 Lithospongiae Tetractinellida 

 .5 Uyalospongiae, Hexactinellida 

 .6 Oalcispongiae 



Cap. XX. 59.35—38 Cnidaria. 



35 Cnidaria 



36 Actinozoa 



,1 Rugosa, Tetracorallia. 

 .2 Alcyonaria, Octocorallia 

 .3 Zoantharia, Hexacorallia 

 .4 Antipatharia 

 .5 Actinaria 

 .6 Madreporaria 



37 Hydrozoa 



37.1 Hydromedusae, Graptolitha 



.2 Siphonophora 



•3 Acalephae 



.4 Calycozoa 



.5 Rhizostomidae 



.6 Marsupialida 



• 7 Discopbora 

 38 Ctenophora 



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



39 Echinoderma 



•1 Crinoidea, Pelmatozoa 

 .2 Asterozoa 

 .3 Asteroidea 

 •4 Ophiuroidea 



Cap. XXII. 



4 Mollusca 



.1 Lamellibranchia 

 .2 Scapbopoda 

 .3 Ga8trofK>da 

 .31 Ampbineura 

 .32 Prosobrancbia 

 .34 Heteropoda 

 .36 Opistbobrancbia 

 .36 Nudibrancbia 

 .37 Tectibrancbia 



39.5 Ecbinoidea 

 .6 Holothurioidea 

 .7 Pedata, Elasipoda 

 .8 Apoda 

 .9 Enteropnensta 



59.4 — 4.5 Mollusca. 



4.38 Pulmonata 

 .4 Pteropoda 

 .5 Cepbalopoda 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 .55 Dibrancbia 

 .56 Octopoda 

 •58 Decapoda 



