120 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



LIST OF FOSSILS FEOM THE HAMILTON FOEMATION 

 OF ONTAEIO. 



In this list the crinoids are arranged in conformity with Wachsmuth 

 and Springer's " Eevision of the Palffiocrinoidea," and the blastoids with 

 Etheridge and Carpenter's " Catalogue of the Blastoidea in the Geo- 

 logical Department of the British Museum," but in all the other groups 

 the classification adopted by Zittel in his " Handbuch der Pateonto- 

 logie" (Munich and Leipsig, 1876-85) has been followed. 



CCELENTEEATA. 



SPONGIiE. 

 Eeceptaculites Neptuni, Defrance. . . . " Near Widder, Out," Hinde. 



ANTHOZOA. 



ALCTONARIA. 



Aulopora Canadensis, Nicholson. 



" cornuta, Billings.* 



" filiformis, Billings. 

 Syi'ingopora intermedia, Nicholson. 



" nobilis, Billings. . . " Hamilton Group of Canada,'' Eominger. 



ZOANTHARIA. 



(a. Tetracoralla, Hteckel : = Rugosa, Edwards and Haime.) 



Microcyclus discus. Meek and Worthen. 



Zaphrentisrornicula, Lesuour " Arkona,'' Nicholson. 



Heteropihrentis prolifica, Billings. 



Cyathophyllum Zenkeri, Billings " Arkona," Nicholson. 



Heliophyllum exiguum, Billings, j 



" Halli, Edwards and Haime. 



" tenuisepttatum, Billings. 



* Dr. Rominger thinks this the young of Romingeria umbeUifern , which is the Auloriora 

 iLinhelliferfi of Billings. 



t Dr. liominger places this spccie-s in the genus Zfj-jhrentif, but in the types the septa are 

 certainly marked on their tiat sides with numerous " obscure arched striaj" as Billings asserts. 



