158 ROYAL SOCIETY OF CANADA 



and 1894. both Cainbro-Siluvian (Ordovician)^ and Silurian rocks were 

 found to occur, as characterized b}' the fossil organic remains of these 

 two distinct systems. 



The S'litn'aii fossils are exceedingly numerous, and for the most part 

 well preserved and silicificd. 



The most abundant species are the chain coral Hdlysites rateniilattis, 

 Linnteus, the stromatoporoid Clathrodictijum fasfujidtum, Nicholson, and 

 the honey-comb coral, Favosi.tes Gothhtndirus, Lamarck. Si/rtiujopora 

 verticillata. Gold fuss, is comparatively abundant, so also is Zaphrentis 

 Stokesi., Edwards and Haime. Besides these, Mr. Lambe has recognized 

 Alveolites Niagnrensis, Eominger, Limaria {Olenites) crassa, Eominger, 

 Lyellla Americana. Edwards and Haime, and Heliolites affinis, Billings. 



The Crinoidea are not numerous, but require furthur study, but 

 appear to be referable to the genera Thysanocriinis, Taxocrinas and 

 Dendrocrina^. 



Of the Bryozoa, Lichcnalia concent rial, Hall, Phœnupora ex.pans((y 

 Hall, both appear to be represented. 



The Brachiopoda are very numerous, especially such forms as 

 Atrypa retii-nhiris, Linna'us, and Pentamenis ohloiKjus, Sowerby. 



The Gasteropoda are mostly referable to the genera Loxonenui, 

 Murrhisonia and Euomphahis, whilst the Cephalopoda are represented 

 by Discosoriis ccmoideus. Hall, Orfhoceras, cf. 0. Cadmus, Billings, 

 Actinoceras vertehratnm. Hall, cf. A. Ba<-ki, Stokes, and Ortlioceras 

 virtpihitiirn, Hall. 



The Trilobita are represented by a single species, the Calipnmene 

 B lumen ba<hi, Brongniart, which is probably identical with ('alijmniene 

 Niaga/ensis, Hall, or C. tuhcrculata of European writers. 



1 So far, the Ordoviciaii fos.sils from this outlier were not found in place, but 

 indicate concluf^ively that species of Trenton or Bird's Eye and Black River age 

 occur in the loose angular blocks of limestone examined, as noted by Sir Wm. 

 Logan and Mr. A. P>. Barlow. The following are the species recorded : Rafines- 

 quina aUervata, Emmons, Machirea cf., M. magmi, Lesueur, M. Atlantica, Bill- 

 ings, Goriiocerns anceps. Hall, and Cameroceras prvtclforync. Hall. As remarked 

 in the Geol. of Canada, 1861^, p. 335, '" the source of these fragments has not yet 

 been ascertained." 



