7 



Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA. 



Cap. XVII. 



31 Protozoa 

 .1 Rhizopoda 

 •2 Foraminifera 

 •3 Heliozoa 

 A Radiolaria 

 .5 Infusoria 

 .6 Flagellata 

 .7 Ciliata 



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. 



34 Spongiae, Porifera 



.1 Myxcmpongiae 

 .2 Ceratospongiae 

 .3 Halichondriae, Monactinellida 



Cap. XIX. 59.34 Spongiae, Porifera. 



34.4 Lithospongiae Tetractinellida 

 .5 Hyalospongiae, Hexactinellida 

 ,6 Calcispongiae 



Cap. XX. 59.35—38 Cnidaria. 



35 Cnidaria 



36 Actinozoa 



.1 Rugosa, Tetracorallia. 

 •2 Alcyonaria, Octocorallia 

 •3 Zoantliaria, Hexacorallia 

 .4 Antipatharia 

 •5 Actinaria 

 .6 Madreporaria 



37 Hydrozoa 



37.1 Hydromedusae, Graptolitha 



•2 Siphonophora 



.3 Acalephae 



.4 Calycozoa 



.5 Rhizostomidae 



,6 Marsupialida 



.7 Discophora 

 38 Ctenophora 



Cap. XXI. 59.39 Echino derma (incl. Enteropneusta). 



39 £chinoderma 



.1 Crinoidea, Pelmatozoa 

 .2 Asterozoa 

 .3 Asteroidea 

 »4 Ophiuroidea 



Cap. XXII. 



4 MoUnsca 



.1 Lamellibranchia 

 •2 Scaphopoda 

 •3 Gastropoda 

 .31 Amphineura 

 .32 Prosobranchia 

 .34 Heteropoda 

 .35 Opisthobranchia 

 .36 Nudibranchia 

 .37 Tectibranchia 



39.5 Echinoidea 

 .6 Holothurioidea 

 ,7 Pedata, Elasipoda 

 .8 Apoda 

 .9 Enteropneusta 



59.4—4.5 Mollusca. 



4.38 Pulmonata 

 ,4 Pteropoda 

 .5 Cephalopoda 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 .55 Dibranchia 

 .56 Octopoda 

 .58 Decapoda 



