412 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



of Canada'' was published (in 1863), as this particular locality is referred 

 to on page 382 of that volume. The organic pirt of the specimen is thin, 

 nearly flat, somewhat diamond shaped, but unsymmeti-ical and unequal 

 sided, with one of the sides deeply and almost angularly concave. Its 

 maximum diameter is twenty-six millimetres, and its surface ornamenta- 

 tion consists of numerous, tine and closely disposed radiating raised lines 

 or minute ridges, which are crossed by equally fine concentric striif or 

 lines of growth. 



Revised list of the fossils of the Hamilton formation of Ontario. 



The arrangement of the species of this list, as in a previous one, is 

 generally in accordance with the classification adupted by Zittel in his 

 Handbuch der Palaeontologie, but with some exceptions. The crinoids are 

 arranged as in Wachsmuth and Springer's monc/graph on the Crinoidea 

 Camerata, the polyzoa or bryozoa as in Ulrich's lai.est " Systematic classi- 

 fication of the Palseozoic Bryozoa,"* the br.ichiopoda as in Mr. Schuohert's 

 " Synopsis of American Fossil Brachiopoda," and the pelecypoda as in 

 Hall's monograph of the l^'evonian Limellibranchiata.']" 



The authority for the identification is given in the case of a few species 

 that the writer has seen no specimens of, and that have not been pre- 

 viously referred to in this paper. 



CCELENTERATA. 



,SP0N(4I^. 



Keceptaculitee Neyituni, Defranco. "Near' Widder, Ontario," Dr. ft. J. Hiiide. 

 AstrHeoHiJongia HanriltonenKis, Meek .and Worthen. 

 ftuppoBed bundles of spicules. 

 iSupjrosed Cliona borings. 



ANTHOZOA. 



ALCYONARIA. 



Aulopora serpens (ftoldfuss ?) Roniinger. 

 Moniloftora antiqua, Whiteaves. 



* In volume three, part one, of the Final Report of the Geological Survey of Minnesota, 

 t In volume five of the Palseontology of the t^tate of New York. 



