7 



Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA. 



31 Protozoa 



.1 Rhizopoda 

 •2 Foraminifera 

 .3 Heliozoa 

 A 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. 



34 Spongiae, Porifera 



•1 Myxospongiae 

 .2 Ceratospongiae 

 .3 Halichondriae, Monactinellida 



Cap. XIX. 59.34 Spongiae, Porifera. 



31.4 Lithospongiae Tetractinellida 

 .5 ïïyalospongiae, Hexactinellidt 

 .6 Calcispongiae 



Cap. XX. 59.35—38 Cnidaria. 



35 Cnidaria 



36 Actinozoa 



.1 Rugosa, Tetracor allia. 

 •2 Alc^onaria, 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 Discophora 

 38 Ctenophora 



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



39 Echinoderma 



.1 Crinoidea, Pelmatozoa 

 .2 Asterozoa 

 .3 Asteroidea 

 .4 Ophiuroidea 



4 MoUnsca 



.1 LamelUbranchia 

 .2 Scaphopoda 

 .3 Gastropoda 

 .31 Amphineura 

 .32 Prosobrancliia 

 .34 Heteropoda 

 .35 Opistbobranchia 

 .36 Nudibranchia 

 .37 Tectibranchia 



Cap. XXII. 59.4- 



39.5 Echinoidea 

 .6 Holothurioidea 

 .7 Pedata, Elasipoda 

 .8 Apoda 

 .9 Enteropneusta 



—4.5 Mollusca. 



4.38 Pulmonata 

 .4 Pteropoda 

 .5 Cephalopoda 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 .55 Dibranchia 

 .56 Octopoda 

 .58 Decapoda 



