SYNOPTICAL CLASSIFICATION of the CHE1LOSTOMATA. 



Class POLYZOA. 



ORDER II. GYMNOL^EMATA. 



Sub-Order I. CHEILOSTOMATA. 



I ARTICULATA. Polyzoariura divided into distinct internodes by flexible joints. 

 I. UNICELLCLARES. Internodes formed of a single cell. 



Fam. 1. CATENICELLIDJE, Busk, Brit. M. Cat., part i, p. 3. 



* Cell at each division of the branches geminate. 



1. CATENICELLA. 



** Cell at each division single. 



2. ALYSIDIUM. 



3. CHLIDONIA. 



*** Cells bi-trilocular. 



4. CALPIDICM. 



**** Cells forming the- stem and primary branches slender and tubular, without a mouth. 



5. EUCRATEA. 



2. MULTICELLULARES. Internodes multicellular. 

 A. Cells disposed in the same plane. 



Fam. 2. CELLULARIID&. 



(a) Inarmatte. Neither avicularia nor vibracula. 



6. CELLULARIA. 



(6) ArmatcB. With avicularia or vibracula, or with both, 

 a. With avicularia and vibracula. 



7. SCRUPOCELLARIA. 



p. With avicularia only. 



8. MENIPEA. 



9. EMMA. 



