154 ROYAL SOCIETY OF CANADA 



typica, Billings. Gonioceras anceps, Hall, Ci/theroj)sis siliqua, Jones, 

 Leperditia Canadensis, v. Paquetteana, Jones. 



Ail of the above were found at Paquette's Eapids, near Westraeath, 

 Ont., whilst the fossiliferous liraestonos of '' La Petite Chaudière," near 

 OttaAva, have yielded the following : — Strophomena incurvata, Shepard, 

 Clathros-pira subconica, Hall, Cyrtodonta subtruncata, Hall sp., Ortho- 

 ceras decrescens, Billings. Gyroceras vagrans. Bill., Cyrtoceras sinuatum, 

 Bill., Illœnus ovatus, Bill., T. Conradi. Bill.. Bathyurus extans, Hall, 

 Leperditia Louckiana, Jones, are also characteristic of the Black Eiver 

 formation in this basin. 



Lots 3 and 4, Concession III., of the riverfront, Tp. of Gloucester, Co. 

 of Carleton, Ont., have yielded an abundant harvest of Black River fossils 

 to Mr. W. R. Billings, and in 1885 the latter published' an interesting 

 article in which the forms there observed were listed. 



The Trenton Formation. 



The numerous outcrops of this formation in the Ottawa Valley, from 

 L'Orignal to Mattawa, have been classic ground to the students of geo- 

 logy and palaeontology ever since the publication of the memoirs by 

 J. W. Salter and E. Billings in the "Decades" and " Pahcozoic Fossils" 

 of the Geological Survey of Canada. These contributions to our knowl- 

 edge of the extinct and varied fauna of this formation, together with 

 numeroias writings by Mr. Billings in the " Canadian Naturalist and 

 Geologist," form a mass of literature of unusual interest. 



The limestones and shales of this formation teem with fossil remains^ 

 and have 3nelded upwards of 400 species in the Ottawa Palaeozoic Basin. 

 The following represent some of the more conspicuous and characteristic 

 fossils of the Trenton as developed in this basin : — Licrophycus Ottawa- 

 e'nsis, Billings, L. minor, Bill., Palœophyciis obsrurus, Bill., are the most 

 conspicuous fossil ALii.E ; Astylospongia parvula, Billings, Steliella Bil- 

 lingsi. Hinde. *S^. crassa, Hinde, Pasceolus globosus, Bill., Receptacul- 

 ites lowensis, Bill., represent the Protozoa ; a Glimacograptus re- 

 sembling C. typicalis, Hall, and a Dictyonema, probably a new species, 

 together Avith Diplograptus amplcxiranalis. Hall, include the Graptolites 

 common to the Trenton ; whereas the Polypi or Corals are represented 

 by PalœopjJiyllnm divaricans, Nicholson, Streptelasvia cornicuhim, Hall, 

 Protarea vetusta, Hall, Petraia Ottaivaënsis, Billings, and a species of 

 Cohimnaria as yet undescribed. 



The i'lriiiNoDKK.MATA are of special interest, and abound in the more 

 shal}' and thin-bedded ])ortions of the liower Trenton of Hull and Ottawa. 

 The Crinoidea include the following: — Archœocrinus lacunosus, Bill., 

 A. marginatus, B., A. microbasalis, V>\\\., 'A. pyriformis, B., Calceocrinus 



1 Trans. Ottawa Fii-hl Nat. Club, vol. 2, No. II., 188.5, p. 2«0. 



