CLASSIFICATION OF ANIMALS. LIST OF PHYLA, CLASSES, AND SUBCLASSES. SUBDIVISION PROTOZOA ( Unica/Our Animals).
Phylum I. l'ItOTOZOA Prot OD /a HS) . Animals composed of a single cell; or. if of several cells, these are of one kind.
Class 1. IlnIZOPODA. Protozoa with retrac tile pseudopodia (Anitcha, etc.) Class 2. MYCETOZOA. Terrestrial protozoa, plasmodia], and forming large and complex cysts (Slimes).
Class 3. Masouommaa. Protozoa with out villa, but with one or more flagella.
Class 4. SPOROZOA. Protozoa, without ap pendages; internal parasites. Class 5. INFUSORIA. Protozoa with cilia.
or sucking tentacles.
Sunaivi SION .11ETAZOA ( ultirellular Animals).
Phylum II. Poturfao. (Sponges). Fixed aquatic .1Ietazoa, whose body-wall is perforated by incurrent pores.
Class PORIFERA. Equivalent to the Phylum.
Subclass '1. Culcarca. Sponges with skele ton of calcareous spieules.
Subclass 2. Non-Co/carcu. Skeleton, when present, composed of siliceous spicule:: or of spongin fibres.
Phylum OELENTERATA ( Polyps, etc.). Animals of radial structure. avhose digestive cavity is lined by the body-wall, and which have nettling organs.
Class I. Ilynaozot. Coelenterates, whose body is composed of more than two rays, and contains a single cavity ( Hydroids, Siphonophores, ate.).
Class 2. SCyruozOA. Cadenterates with many radii, and with radial partitions in the cavity of the body (Jellyfishes).
Class 3. Actallozoi. Attached individuals or colonies.
Subclass 1. Zoo 72 thuria. Tentacles numer ous. and usually in multiples of live (Sea-Anemones, Madrepores, and Corals).
Subclass 2. .1(caonaria. Tentacles. eight only (Red Corals, Sea-Fans. etc.).
Class 4. C•:Noenoaa. Coelenterates with wily two radii, and rows of cilia plates.
Phylum IV. PLATY11 ELM INTIIES (Flatworms). Bilaterally symmetrical. soft-bodied animals, without t rue segmentation of the body; flattened in a dorso-ventral direction, and having the body cavity filled with a loose meshwork of evils.
Class 1. TURBELLARIA. Free-living flat worms, whose body is covered by cilia; alimentary tract with only one opening to the exterior (Planarians).
Class 2. Timm ATODA. Parasitic, n nseg mcnted . without ell in in the adult. and with a well-developed digest ive apparatus ( Flukes).
Class 3. CEsTona. Elongated, usually un segmented hermaphrodite endo parasites. without mouth or ali mentary canal (Tapeworms, el e.).
Class 4. NEMERTINEA. Body more or less flattened; food-ea nal with month and arms; aquatic, carnivorous.
Subclass 1. Pahronemerlincu.
Subclass 2. Nehi:onetnerleu.
Subclass 3. Hoplonewerlea.
Phylum V. NEM ATHELNY I N VIES ( 1101111d worms). Bilateral. unsegmentcd, round-bodied; usually with alimentary tract, mouth, and arms.
Class 1. NEMATODA. With intestinal canal; without proboscis; free-living in fresh or salt water. or parasitic (Threadworms).
Class 2. AVANTHOCEPHALA. 310llth and in testines wanting; parasitic.
Class 3. CILETOGN ATI! A. Pelagic 'arrow worms;' spiny, and with a yell developed nervous system.
Phylum VI. TROCIIELMINTIIES ( Wheel-Ani malcules.) Characterized by having the larva in the form of a troehosphere.
Class 1. ROTIFERA. iCrOSCOpie wheel animalcules, with a ciliated band around the mouth, and a special organ for attachment.
Class 2. Dixocuti.Ea. Minute. worm-like, having five to eight usually ciliated; and nephridia in pairs; marine.
Class 3. GASTROTRICIIA. Minute, spindle shaped. flattened and ciliated on the ventral surface; fresh waters.
Phylum VII. Motaa'scoma (Sea-Mats and Brachiopods). Small aquatic animals, having a.
true body-cavity (except in Endoproeta) and suspended alimentary canal; dorsal region ab breviated and surmounted by lophophore.
Class 1. PoLyzo.k. Molluseoida that form colonies connected by one organic :substance; the ciliated band of the lophophore is drawn out into tentacles (Bryozoans).
Subclass 1. Eetoprocta. Anus outsideten lacular corona.
Subclass 2. Emloproela, Anus internal; form colonies by budding.