■ CORALS AND (^OKALFilFORM TYPES. 48 



Fam 1. Cyathnphi/lltdrr. 



Group A.— Tesselalt : Compound vesioiilo-stellatc Ci/atlio/th!/lli(l(C composed of closely 

 uuitod corallites, forming mosaic-liko, tesselatod or asteroidal groups. 



Ci/athogonium, E. J. C. ( = tesselati'd forms of Ci/ulliojilii/llitm ; also 



Str- abodes and Acervularia), Sil., Dev., Carb. 

 HeHos;onium, E. J. C. ( = tesselated forms of Helv-pfiyl/um), Sil., Dev. 

 Phillipsaslrcsa, E. & H. (including Puchyphijlium), Dev., Carb. 



Group B.—Aritndinacei : Vesiculo-stellato CyathophijUidfC, composed of roed-liki- or 

 tubular corallites, either .simple or in partially connected groups. 



Cannophyllum, E. J. C ( = reed-like forms of Ci/alhophyUum), Dev., Carb. 

 Dipliy/iJiyllum, Lonsd. (including Slylaslrea), Sil., Carb. 

 Eridophyllum, E. k H., Sil., Dev: 



Group C.—Corntculati: Simple vesiculo-stellate C//«Mf#/y//«V^'' of more or less conical 

 or horn-like form. 



Cyaihophylhtm, Goldf. (including Dicophylhim and Compophylhtm), Sil., 



Dev., Carb. 

 Heliopliyllum (r .ig AntntliopltyUmii), Sil., Dev. 



Blothrophyll .il.. Dev. 



Chsiophyliwh, Dana, Sil, Dev., Carb. 

 {Pycnophylltm, Linds., Sil. 

 Strephodes, McCoy, Sil., Dev., Carb. 



Fam. 2. Lonsdalidce. 



Group A. — Aggregali: Compound forms of IfOrts</a/tcfe. 



Lonsdalia, McCoy (including StyHdophylliim), Carb. 



Lithostrolion (including Koninckophylhim in part, Petala.ris. Stylaxis, etc.), 

 Carb. 



Group B. — Turbinati : Simple, more or less turbinated or horn-like forms of Lons- 

 dalid<v : 



AxophyUum. E. & H., Carb. 



Koninckophyllum (f) Nich. ( = simple forms oi LithoHrotion), Carb. 



Fam. -3. Slaurida- : — Primary septa forming a rectangular cross : 



Group A. — TesselaH: Compound tesselated forms of Staurida : 



Stauria, E. & H., Sil. 

 Group B. — Turbinnli : Simple forms of Slauridcc : 



Omphyma, Eaf., Sil. 



