Miscellanies. 317 



" In the two lower divisions (960 feet) the fossils that are of 

 known species have been found in the Hudson or Trenton group, 

 with three exceptions, the Heliolites megastoma, Catenipora escha- 

 roides and Favosites favosa, not before known to extend into the 

 Lower Silurian. Singular tree-like fossils (Beatricea) occur 430 

 feet from the base. They are straight stems 1 to 14 inches in 

 diameter, tubular, with the tube transversely septate, the structure 

 in layers resembling in this respect an exogenous tree. 950 feet 

 above the base there are three additional Upper Silurian fossils, Lep- 

 tcena subplana, Sirophom.ena depressa and A trypa naviformis. In the 

 upper 600 feet, 60 species of fossils were collected, and 20 out of 

 the 24 hitberto described occur in the Clinton group, while 12 of 

 the 24 are found also in the beds below. The following are the 

 names of the 24 species ; those in italics occur also in the lower 

 beds of Anticosti, and those marked with an asterisk, are known 

 as species of the Clinton group. Chmtetes lycoperdon* Catenipora 

 esckaroides* Favosites favosa, Zaphrentis > bilateralis,'* Orthis 

 Lynx* O. elegantula,* 0. flabellulum, Leptoena subplana* L. 

 transversalis, L. profunda, Strophomena alternate* S depressa* 

 Atrypa reticularis* A. congesta* A. plicatula,* A. hemispherica,* 

 A. naviformis* Spirifer radiatus,* Pentamerus oblongus,* Murchi- 

 sonia subulata* Cyclonema cancellata,* Platyostoma hemisphe- 

 rica, Calymene Blumenbacliii* Bumastes Barriensis.* 



" Mr. Billings describes a number of new Cystidese and Asteriadse 

 from the Silurian of Canada, besides various Brachiopods and 

 other molluscs. The genus Huronia he refers to Orthoceras (or 

 Ormoceras if that genus be retained). 



"Next follows the Report of T. Sterry Hunt, Chemist and Mine- 

 ralogist to the Geological Survey. We have already quoted a 

 few facts on minerals from this report; also at page 217 an arti- 

 cle on Ophiolites, and page 361 a chapter on the Salines of 

 Europe. "We propose to cite farther on the subject of rocks at 

 another time. There are also valuable chapters on the Metallurgy 

 of Iron, Magnesian Mortars, the Purification of Plumbago, and 

 Peat and its products, which we must pass by. 



" The quarto volume of twenty maps of the various lakes and 

 rivers between Lake Huron and the Ottawa, by Mr. Murray, show 

 that the Canadian government is carrying forward the survey on 

 the right plan — a union of geographical and geological investiga- 

 tions. The maps are of large size, nearly two feet by three, and 

 contain particulars respecting the rocks of the regions, besides the 

 usual map details, and in both respects a large amount of work 

 has been ably performed." 



