95 



Post-Tertiary. Beginning with these newer fleposits, Mr. Ami 

 leports that on account of the numerous excavations for sewei'S, etc., 

 he has been enabled to obtain a number of interesting sections of the 

 strata from the boulder clay and glacial drift deposits up to the recent 

 overlying sediments. The results thus obtained fi-om various parts of 

 our city, will be embodied in a communication (now in course of pre- 

 paration) shortly to be presented to the Club entitled: " The Great Ice 

 Age and Subsequent Formations at Ottawa." 



Hudson River Formation. A s[)ecial visit was paid to the ex- 

 posures of this formation in October last and a number of interesting 

 forms were found. The collection yielded a number of species new to 

 ths list already published in the Transactions of the Club (Trans. 0. 

 F. N. C, Vol. II, No. 2, })age 25S). These were : Pterinea demissa, 

 Conrad, an eminently characteristic species ; Strophomena (Strejytorhyn- 

 chus) subtenta, Courad ; Platijstrojjhia lynx, Eichwald {Platystrophia 

 hifoviata, Schlotheini, var, hjnx, Eichwald and Orthis lynx, Eichwald, of 

 authors) ; Leptcena sericea, Sowerby (very abundant) ; Oalymene 

 senaria, Conrad ; a Pleurotomaria. allied to suhconica, Hall; a trilobite 

 referred provisionally to the genus Remopleurides, besides portions of 

 Monticuliporoid corals each of which last three mentioned require 

 further study. The opening which was made in the field to the north 

 of the Canada Atlantic Railway track some three and three-quarter 

 miles from the city has affbided a good many specimens. The beds are 

 light brown or buff weathering, and consist of a fine grained calcareo- 

 argillaceous dolomitic paste with some arenaceous material in a finely 

 divided state. The fossils which they contain are toleiably well pre- 

 served and abundant and whilst only some fifteen species have as yet 

 been observad in this formation from that locality there is no doubt 

 that future investigations will increase that number considerablv. 



Utica Formation. Most of the attention devoted to this forma- 

 tion has been in the direction of ascertaining what were the species 

 associated in the same band of impure limestone with Siphonotreta 

 Scoiica, Davidson. Several sub-excursions were held to the locality 

 (mentioned in the Report of Geological Branch, in the transactions of 

 the Club for 1885-8G) o|)posite the Rifle Range on the Rideau River in 

 Gloucester, and no less than sixteen species have already been found in 



