APPENDIX 



A SYNOPSIS OF THE CLASSIFICATION OF ANIMALS 

 PHYLUM I. PROTOZOA 



Single-celled animals, aquatic and microscopic. 



Class 1. Sarcodina. Protozoans with more or less protractile pseu- 

 dopodia. 



Order 1. Rhizopoda. Pseudopodia without axial filament and 

 usually very retractile. Ex. Amoeba. 



Order 2. Heliozoa. Freshwater Sarcodina with silicious skeleton 

 and ray -like pseudopodia, each with an axial filament. Ex. Actino- 

 spherium. 



Order 3. Radiolaria. Marine Sarcodina with silicious skeleton. 

 Ex. Polycystina. 



Class 2. Mastigophora (Flagellata). Protozoans with one or more 

 vibratile flagella. Ex. Euglena. 



Class 3. Sporozoa. Protozoans which are internal parasites and 

 have no locomotory organs as adults. Ex. Gregarina. 



Class 4. Infusoria. Protozoans with cilia or sucking tentacles. 



Order 1. Ciliata. Ciliate infusorians. Ex. Paramecium. 



Order 2. Suctoria. Infusorians with sucking tentacles. Ex. Acineta. 



PHYLUM II. COELENTERATA 



Radiate animals with a single, but sometimes branched, internal 

 cavity and no coelom. 



Subphylum I. Spongiaria (Porifera). Sessile, mostly colonial 

 animals without specialized organs or tissues ; body-wall pierced by 

 numerous pores or canals and usually stiffened by either calcareous 

 or silicious spicules and either with or without spongin fibers. 



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