7 Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA. 



31 Protozoa 

 .1 Rhizopoda 

 .2 Foraminifera 

 .3 Heliozoa 

 .4 Radiolaria 

 .5 Infusoria 

 ,6 Flagellata 

 .7 Ciliata 



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. 



34 Spongiae, Porifera 



.1 Myxospongiae 



.2 Ceratospongiae 



•3 Halicliondriae, Monaetinellida 



34.4 Lithospongiae Tetractinellida 

 .5 Hyalospongiae, Hexactinellidf 

 .6 Calcispongiae 



Cap. XX. 



35 Cnidaria 



36 Âctinozoa 



.1 Rugosa, Tetracorallia. 

 .2 Alcyon aria, Octocorallia 

 •3 Zoantharia, Hexacorallia 

 .4 Antipatharia 

 .5 Actinaria 

 .6 Madreporaria 



37 Hydrozoa 



59.35—38 Cnidaria. 



37.1 Hydromedusae, Graptolitha 

 •2 Siphonophora 

 .3 Acalephae 

 .4 Calycozoa 

 .5 Rhizostomidae 

 .6 Marsupialida 

 • 7 Discophora 

 38 Ctenophora 



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



Echinoderma 



.1 Crinoidea, Pelmatozoa 

 .2 Asterozoa 

 .3 Asteroidea 

 ,4 Ophiuroidea 



4 Mollusca 



.1 



.2 



.3 



.31 



.32 



.34 



.35 



.36 



.37 



Lamellibranchia 

 Scaphopoda 

 Gastropoda 

 Amphineura 

 Prosobranchia 

 Heteropoda 

 Opisthobranchia 

 Nudibranchia 

 Tectibranchia 



39.5 Echinoidea 

 .6 Holothurioidea 

 .7 Pedata, Elasipoda 

 .8 Apoda 

 .9 Enteropneusta 



Cap. XXII. 59.4—4.5 Mollusca. 



4.38 Pulmonata 

 ,4 Pteropoda 

 .5 Cephalopoda 

 .51 Tetrabranchia 

 Nautiloidea 

 Ammonitae 

 .55 Dibranchia 

 .56 Octopoda 

 Decapoda 



.52 

 .53 



.58 



