374 Rejwrls and Proceedings — 



'Trenton Limestone ' is used in a somewhat comprehensive sense, 

 to include all those highly fossiliferous deposits which immediately 

 and conformably overlie the St. Peter's sandstone, and underlie the 

 Hudson River formation." All the specimens are now in the 

 Museum of the Geological Survey of Canada at Ottawa. 



The species described are as follows : Endoceras annulatum, Hall, 

 var., E. subannulatum, Whitfield, E. crassisiphonatum, sp. nov., 

 Ortlioceras Simpsoni, Billings, 0. semipJanatiim, sp. nov., 0. Selkirlc- 

 ense, sp. nov., 0. Winnepegense, sp. nov., Actiuoceras Richnrdsoni, 

 Stokes, A. Bigshiji, Bronn, A. Allumetense, Billings, sp., Sactoceras 

 Canadense, sp. nov., Gom'oceras Lambii, sp. nov., Polerioceras nobile, 

 Whiteaves, P. apertum, Whiteaves, P. gracile, sp. nov. The species 

 are here given in the order in which the author describes them, 

 which is that adopted by von Zittel in the second volume of his 

 " Handbuch der Pal^ontologie " (1887) ; but the genera Actinoceras 

 and Sactoceras are " I'egarded as distinct from Ortlioceras, and 

 Poferioceras from GompJwceras." 



The most interesting species described in this brief monograph, 

 both for its rarity and peculiar form, is the Gonioceras. This is 

 represented by a single, large example, rather more than ten inches 

 long, and having a maximum diameter at the larger end of six inches 

 and a half, and at the smaller end of five inches. It differs from 

 the type of the genus [G. anceps, Hall) chiefly in its much greater 

 size, and in the smaller size and peculiar shape of its siphuncle ; the 

 septa are also less curved laterally than they are in G. anceps. In 

 the latter feature G. Lantbii is scarcely typical of the genus to which 

 it is assigned ; but the compressed lenticular form of the shell, and 

 the position of the siphuncle, justify the author in referring it to 

 Gonioceras. 



All the species are figured with one exception (Pterioceras nobile). 

 Though only outlines, the figures are executed with so much boldness 

 and artistic spirit that the absence of shading can hardly be con- 

 sidered as a serious drawback. A. H. F. 



I. — The Eoyal Society of Canada, Eleventh Annual Meeting, 

 May 30 to June 2, 1892. 



EIFTEEN papers were read by Fellows of the Eoyal Society of 

 Canada at its last meeting, just closed, in Section {IV. ) of 

 Geology and Biology, and five more in the Department of Chemistry 

 and Physical Sciences (Section III.). 



Of the latter, Professor Chapman's paper " On a New Form of 

 Application Goniometer " is of interest to geologists and mineralo- 

 gists, as is also his additional note "On the Mexican Type in the 

 Crystallization of the Topaz, with some Remarks on Crystallographic 

 Notation." 



Then comes Professor J. G. MacGregor's address on " The 

 Fundamental Principles of Abstract Dynamics." Here the inde- 



