( 



7 



Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA, 



81 Protozoa 

 •1 Rhizopoda 

 •2 Foraminifera 

 •3 Heliozoa 

 •4 Radiolaria 

 •5 InfuBoria 

 .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 Halichondriae, Monactinellida 



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 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 Echino derma (in cl. Enteropneusta), 



39 Echînoderma 



•1 Crinoidea, Pelmatozoa 

 •2 Asterozoa 

 •3 Asteroidea 

 •4 Ophiuroidea 



.o Echinoidea 



.6 Holothurioidea 



.7 Pedata, Elasipoda 



.8 Apoda 



.9 Enteropnensta 



Cap. XXII. 



Mollusca 



►1 Lamellibranchia 

 .2 Scaphopoda 

 .3 Gastropoda 

 »31 Amphineura 

 .32 Prosobranchia 

 .34 Heteropoda 

 .35 Opistbobranchia 

 .36 Nudibranchia 

 .37 Tectibranchia 



59.4 — 4.5 Mollusca. 



4.38 Pulmonata 

 .4 Pteropoda 

 .5 Cephalopoda * 

 .51 Tetrabranchia 

 .52 Nautiloidea 

 .53 Ammonitae 

 •55 Dibranchia 

 •56 Octopoda 

 .58 Decapoda 



