BIOLOGICAL CLASSIFICATION. 1409 



Subclass Hexacoralla. 

 Order Madreporaria. 



Family Etjpsammid^e Edwards and Haime. 

 Calostylis Lindstrom. 



Subclass Alcyonaria (Octocoralla). 



Family Heliolitid^; Lindstrom. 



CalvLnia Ravage, Heliolites Dana, Lyellia Edwards and Eaime, Flasmopora Edwards 

 and Haime, Protarca Edwards and Haime, Stylarasa Seeback, Thecia Edwards and 

 Haime. 



Suborder Tabulata. 



Family Favositid^ Edwards and Haime. 



Alveolites Lamarck, Calapoecia Billings, Cladopora Hall, Coenites Eichwald, Dictyo- 

 stroma Nicholson, Favosites Lamarck, Michelinia Dekoninck, Palaeofavosites 

 Twenhofel, Parallelopora Holtedahl, Platyaxum (Davis) Foerste, Striatopora Hall, 

 Syringolites Hinde. 



Family Auloporid,e Nicholson. 



Aulopora Goldfuss, Fletcheria Edwards and Haime, Roiningeria Nicholson. 



Family Syringoporid^e Edwards and Haime. 



Cannapora Hall, Ceratopora Grabau, Diorychopora Davis, Syringopora Goldfuss, Ver- 

 mipora Hall. 



Family Halysitid^e Edwards and Haime. 



Halysites Fischer, Labyrinthites Lambe. 



Family Ch.etetid;e Edwards and Haime. 



Chastetes Fischer, Darda Edwards and Haime, Tetradium Dana. 



Class HYDROZOA. 

 Order Stromatoporoidea. 



Family Actinostromid.^3 Nicholson. 



Actinodictyon Parks, Actinostroma Nicholson and Murie, Clathrodictyon Nicholson 

 and Murie, Stylodictyon Nicholson. 



Family Labechiid;e Nicholson. 



Aulocerium Parks, Dermatostroma Parks, Labechia Edwards and Eaime, Lophio- 

 Btroma Nicholson, Rosenella Nicholson, Stromatocerium Hall. 



Family Beatriceimd Ulrich. 



Beatrices Billings, Cryptophragmus Raymond. 



Family Stromatoporid^e Nicholson. 



Stromatopora Goldfuss, Stromatoporella Nicholson, Syringostroma Nicholson and 



Murie. 



Family Idiostromid;e Nicholson. 



Hermatostroma Nicholson, Idiostroma Winchell. 



