7 



Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA. 



Cap. XVII. 59.31 Protozoa. 



31 Protozoa 31.75 Suctoria 



.1 Rhizopoda .9 Sporozoa 



.2 Foraminifera .91 Gregarinidae 



•3 Heliozoa .92 Coccidia 



.4 Radiolaria »926 Haematozoa 



•5 Infusoria .93 Sarcosporidia 



.6 Flagellata .94 Myxosporidia 



•7 Ciliata .95 Microsporidia 



Cap. XVIII. 59.33 Coelenterata. 



Cap. XIX. 59.34 Spongiae, Porifera. 

 34 Spongiae, Porifera 34.4 Lithospongiae Tetractinellida 



.1 Myxospongiae 



.2 Ceratospongiae 



.3 Halichondriae, Monactinellida 



.5 Hyalospongiae, Hexactinellida 

 .6 Calcispongiae 



Cap. XX. 



35 Cnidaria 



36 Àctinozoa 



.1 Rugosa, Tetracorallia. 

 .2 Alcyonaria, Octocorallia 

 •3 Zoantharîa, 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 

 Ctenophora 



Cap. XXI 



► Echinoderma 



.1 Crinoidea, Pelmatozoa 

 •2 Asterozoa 

 .3 Asteroidea 

 A Ophiuroidea 



59.39 Echinoderma (incl. Enteropneusta), 



19.5 Echinoidea 

 .6 Holothurioidea 

 .7 Pedata, Elasipoda 

 .8 Àpoda 

 .9 Enteropneusta 



Cap. XXII. 59.4—4.5 Mollusca. 



4 Mollusca 



.1 



.2 



.3 



.31 



.32 



.34 



.35 



.36 



.37 



Lamellibranchia 

 Scaphopoda 

 Gastropoda 

 Amphineura 

 Prosobranchia 

 Heteropoda 

 Opisthobranchia 

 Nudibranchia 

 Tectibranchia 



4.38 Pulmonata 

 .4 Pteropoda 

 .5 Cephalopoda 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 .55 Dibranchia 

 .56 Octopoda 

 .58 Decapoda 



