APPENDIX II 



For convenience of reference, the system of classification of the 

 animals and plants which has been used in the book is here given 

 in tabular form, omitting those groups which possess no importance 

 as fossils. Groups marked with an asterisk (*) are extinct. 



ANIMALS 



/ A. Protozoa ' - .p 



RHIZOPODA <JL^£jr - Ovy cr ^^f^ i h^y^^ 



Foraminifera. 

 Radiolaria ^ 



II. CCELENTERATA 



Class i. Hydrozoa H^p 



a. Hydroidea, b. Siphonophora, c. Discophora, Jelly-fishes 

 Class 2. Anthozoa f€^v^^ 



a. Alcyonaria, b. Zoantharia, Corals 

 a. Tetracoralla 

 j8. Hexacoralla 

 Class 3. Ctenophora 



III. VERMES, Worms 



IV. ECHINODERMATA 

 Class *i. Cystidea 

 Class *2. BlastoideaV^^ 

 Class 3. Crinoidea, Crinoids ^«^*t- 



*a. Palceocrinoidea (Tessellafa), b. Neocrinoidea (Articulata) 

 Class 4. Asteroidea 



a. Ophiurida, Brittle-stars, K Stellerida, Star-fishes 

 Class 5. Echinoidea, Sea-urchins 



Subclass A. *Pal^oechinoidea 

 Subclass B. Euechinoidea 



Order a. Regulares, Regular Sea-urchins 

 Order b. Irregulares, Spatangoids, Sand-dollars 

 Class 6. Holothuroidea, Sea-cucumbers 

 2N 545 



