261 



With reference to the Trenton group I may mention that this list 

 does not include all the Ottawa fossils described and recorded from that 

 group by E. Billings and others, which fact Mr. Ami mentions in his 

 introduction. These neglected names, which I pro|)o.se to record are as 

 follows : — 



Gly))tocrinus ornatus, Keport G. S. C 1853--1-5-G. 

 Dendrocrinus conjugans, '.' " " 



Carabocrinus I'adiaius, " " " 



Orthis gibbosa, •' " " 



Cyrtoceras simplex, " " " 



Vanuxemia inconstans, Report G. S. C. 1857. 

 Cyrtodonta subangulata, " " 



C. obtusa, " 



- C. Canadensis, " " 



C. subcarinata, " " 



•C. rugosa, " " 



Bellerophon (Bucania) disculus, Report G.S.C., 1863, pages 166-7. 

 Euneraa strigillata, " " , " 



Helicotoma phinulata, " '• '' 



Matheria brevis, " " " 



M. obtusa, " " " 



Modiolopsis meyeri, Paheozoic Fos , Vol. I, G. S. C. 

 Cienodouta abrupta, " '• " 



Orthis porcata, " " " 



O. retrosa, " '• " 



Illaenus angusticollis, Canadian Nat. and Geol., 1st series, Vol. 4. 

 Strophomena (Streptorynchus) fluctuosa, " " Vol. 5. 



S. camerata. 

 Pleurotomaria progne, 

 P. americana, 



Goniphoceras pra?raaturum, 

 Calapcecia canadensis, Canadian Nat. anrl Geol., 2nd series. Vol. 2. 



All the above were recorded by E. Billings, and the following by 

 Prof. Nicholson : — 



Ftilodictya fenestelliformis, Report Paleontology of Ontario, 1875. 

 Strophomena rhomboidalis, " " " 



Twenty-seven species recorded by E. Billings and two by Prof. 

 Nicholson, in all twenty-nine. 



Of species observed by myself in this neighbourhood, not occurring 

 in Mr. Ami's list and unrecorded by E. Billings or Prof. Nicholson, I 

 may mention the following : — 



1. Lingula elongata. 



2. Discina pelopea. 



