16 ELEMENTS OF PALAEONTOLOGY 
OUTLINE CLASSIFICATION OF THE ANIMAL KINGDOM. 
Sub-Kingdoms. Sub-Branches. Classes. 
1. Rhizopoda. 
2. Flagellata 
I PROTOZOA . : : : ; . 2 : | 9. Infusonmet 
t 
4. Gregarina+ 

I. Porifera . : . 1. Spongiae. 
Il. COBLENTERATA - Asinee 
if *Gusdarie fi. Anthozoa. 
Say ; : " (2. Hydrozoa, 
| 1. Crinoidea. 
I. Pelmatozoa ~ 2. Cystoidea, 
|3. Blastoidea. 
Ill ECHINODERMATA 4 Teast fl. Ophiuroidea. 
; ; " \2. Asteroidea, 
, [1. Echinoidea. 
att Heninozes * | 2. Holothurioidea. 
‘1. Platyhelminthes.+ 
2. Nemathelminthes. 
- 3. Gephyrea. 
4, Rotifera.+ 
5. Annelida. 

IV. VERMES 

M (1. Bryozoa. 
; j 
V. MOLLUSCOIDEA , : : . . ‘ (2. Brachiopoda. 
1. Lamellibranchiata. 
2. Scaphopoda, 
VI. MOLLUSCA . : : é ; k : . , 3. Amphineura, 
4, Gastropoda. 
5. Cephalopoda, 
| I. Branchiata . . 1. Crustacea. 
VII ARTHROPODA (1. Myriopoda. 
Il. Tracheata . 2. Arachnoidea. 
| [s. Insecta. 
(1. Pisces. 
2 Amphibia. 
VIII. VERTEBRATA . 3. Reptilia, 
4, Aves, 
5. Mammalia. 
1 Unknown in the fossil state. 
