7 



Invertebrata — Mollusca. 



Cap. XVI. 59.2 INVERTEBRATA, 



Cap. XVII. 



31 Protozoa 

 .1 Rhizopoda 

 •2 Foraminifera 

 •3 Heliozoa 

 •4 Hadiolaria 

 «5 lofusoria 

 .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. 



84 Spongiae, Porifera 

 .1 Myxospongiae 

 •2 Ceratospongiae 

 •3 Halichondriae, Monactinellida 



Cap. XIX. 59.34 Spongiae, Porifera. 



34.4 Lithospongiae Tetractinellîda 

 .5 Hyalospongiae, Hexactinellida 

 •6 Calcispongiae 



Cap. XX. 59.35—38 Cnidaria 



35 Cnidaria 



36 Actiuozoa 

 .1 Rugosa, Tetracorallia. 

 .2 Alcyonaria, Octocorallia 

 ,3 Zoantharia, Hexacorallia 

 •4 Antipatharia 

 •5 Actinaria 

 .6 Madreporaria 



37 Hydrozoa 



37.1 Hydromedusae, Graptolitha 

 •2 Sîphonophora 

 .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 Asteroîdea 

 ,4 Ophiuroidea 



Cap. XXII. 



4 Mollusca 



.1 Lamellibranchia 

 .2 Scaphopoda 

 .3 Gastropoda 

 .31 Amphineura 

 .32 Prosobranchia 

 •34 Heteropoda 

 .35 Opisthobranchia 

 .36 Nudibranchia 

 .37 Teetibranchia 



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 ïetrabranchia 



.52 

 .53 

 .55 

 .56 

 .58 



Nautiloidea 

 Ammonitae 

 Dibranchia 

 Octopoda 

 Decupoda 



