Geology and Mineralogy. 77 



Hall, C. bicomis, var. tricomis Lapworth, Gorynoides caly- 

 cidaris Nicholson. 



In a paper which the writer is now preparing for the Royal 

 Society of Canada, the various forms characterizing the Sillery, 

 Levis and Quebec divisions of the Quebec Group in Canada as 

 now understood, and constituting the natural series of sedimen- 

 tary strata to which Sir William Logan had given that very 

 appropriate term will be tabulated and the paleontological 

 grounds for their separation made evident. 



5. Geological and Natural History Survey of Canada. 

 Annual Report (new series) vol. iv, 1888-89. — This large volume, 

 recently issued, contains after the summary reports of the opera- 

 tions of the Geological Survey for the year 1889, by the Director, 

 (65 pp.), the following papers : 



On a portion of the West Kootanie District, British Columbia, 

 by G. M. Dawson, (65 pp.) On an exploration in the Yixkon and 

 Mackensie Basins, by R. G. McConnell, (144 pp.) Exploration 

 of the glacial Lake Agassiz in Manitoba, by Warren Upham, 

 (121 pp.) On the mineral resources of the Province of Quebec, 

 by R. W. Ells, (158 pp.) On the surface geology of Southern 

 New Brunswick, by R. Chambers, (88 pp.) Chemical contribu- 

 tions to the geology of Canada, by G. Christian Hoffmann, (V pp.) 

 Mining and Mineral Statistics of Canada, by H. P. Brumell, (81 

 pp.) Report of the Division of Mineral Statistics and Mines, by 

 E. D. Ingall and H. P. Brumell, (123 pp.) Annotated list of the 

 minerals occurring in Canada, by G. C. Hoffmann, (67 pp.) 



6. Notes on Brazilian Mineralogy. — Dr. E. Hussak in the 

 "Boletim da Commissao geographica e geologica do Estado de 

 S. Paulo" No. 7, (40 pp., S. Paulo, 1890,) gives some valuable 

 observations on some minerals and rocks from Southern Brazil. 



Heulandite, mesolite, desmine (stilbite) and scolezite are min- 

 utely described. They occur in amygdaloidal cavities in the 

 great trap sheets of presumably Triassic age that abound in 

 Southern Brazil, in association with calcite, chalcedony, chlo- 

 ritic minerals, native copper, etc. The heulandite and mesolite 

 were from the Serra de Botucatu ; the stilbite from the Serra de 

 Brotas, and the scolezite from Santa Catharina. The form and 

 optical characters of these zeolites are given and also the follow- 

 ing analyses : 





Si0 2 



A1 2 3 



CaO 



Na 2 



K 2 



H 2 



Heulandite, 



5810 



16-67 



590 



061 



3-26 



16-16= 100-70 



Mesolite, 



47 61 



26-80 



7-08 



7-80 





12-11 = 101-40 



Stilbite, 



60-82 



16-67 



4-25 



1-73 





18-12 = 101-59 



Scolezite, 



45-96 



26-03 



13-53 











13-67= 9919 



A careful study was made of the virgin auriferous gravel from 

 the valley of the Ribeira. From an abandoned placer mine on the 

 Pedro Cubas, a small branch of the Ribeira, the following species 

 were identified: Andalusite, chiastolite, staurolite, tourmaline 

 and corundum all abundant; magnetite, titaniferous magnetite, 

 ilmenite, rutile (with sagenite) anatase, titanite, zircon, gold, native 



