352 



Prof. VogVs Neio Classification, as it is to he adopted in his 

 Text- Book of Zoology. 



DEPARTMENT. 



ORDER. 



1. Protozoa. -No sex. (^ ^^'^'^opod,, 

 No egg. I Infusoria, 



2. Radiata. — Eiijbryo 

 growing out of the 

 whole egg. JNo dis- J 

 tinct nervous system 



Polyps, 



Hydromedusas, 

 Siphonophora, 



Echinoderms, 



Monosomatia, 



Polythalamia, 



Astoma, 



Stomatoda. 



Hexactinia, 



Pentactinia, 



Octactinia. 

 C Hydroids or incomplete 

 < Medusae, 

 C Medusae. 



Siphonophora. 

 f Crinoids, 



Stellerids or Star Fishes, 



Echini or Sea Urchins, 



"Worms. — Bilateral 

 Embryo growing out 

 of the whole egg. 

 No separate Blasto- 

 derm. Nervous sys- 

 tem systematic. 



f Vesicularii (Rundwur- 

 mer) 



Planularii, 



Rotatoria, 



Annelids, 



Sub-department, f Bryozoa, 

 Molluscoidea. One J 



4. Molluscs. — 

 Embryo, 

 growing out 

 of the whole < 

 egg. Nerv- 

 ous system 

 asymmetric. 



single nervous gan- 

 glion. 



Sub-depart- 

 ment, MbZ/ws- 

 ca. Scattered 

 nervous gan- 

 glia. 



Acepha- 



Cephalo- 

 phora. 



Ctenophora, 



[ Tunicala, 



f Sub-class : 

 Brachiopoda, 



Sub-class : 

 Lamelli bran- 



chiata, 



Sub-class : 

 Pteropoda, 



Sub-class : 

 Heteropoda, 



Sub-class : 

 Gasteropoda, 



5. Cephalopods. - 

 Yolk cephahc. 



6. Articulata. — 

 Yolk dorsal. 



7. Vertebrata. — 

 Yolk ventral. 



Cephalopoda, 



[ Holothurii. 

 f Gregarina, 

 j Echinorhynchi, 

 j Gordiae, 

 [^ Nematoids. 

 C Cestoidea, 

 I Trematoda, 

 "] Planariae, 

 [^ Nemertini. 

 C Fixa, 

 I Natantia. 

 C Bdellina, 



I Gephyrea (Echiurus, Si- 



J punculus) 



Lumbrici, 



Tubicola, 



Errantia. 



( Stelmatopoda, 



( Lophopoda. 

 Beroida. 



5 Ascidiae, 



( Biphora. 



< Hippuridea, 

 I Regulares. 

 r Pleuroconcha, 



< Orthoconcha, 

 Clnclusa. 



I Pteropoda. 



I Heteropoda. 



C Branchiata, 



< Pulmonata, 

 C. Articulata (Chiton.) 



5 Tetrabranchiata, 

 i Dibranchiata. 



