Geology and Mineralogy. 249 



ing no lava concerned. But those fifteen to twenty explosions, a 

 minute or more in durations with their throws of dust and steam 

 and apparent regularity of interval, suggest that possibly lava 

 was concerned. For they are very like the explosions and pro- 

 jectile action of confined accumulations of steam on breaking 

 through viscid lavas. 



From an analysis and the optical characters of the rocks of the 

 volcano it was made to consist chiefly of labradorite and augite. 

 An analysis by Professor T. Wada, Director of the Geological 

 Survey, obtained, Silica 59-56, alumina 16-10, Fe„0 3 6-28, FeO 

 3-02, Mn 3 4 1-80, lime 6-32, magnesia 3-08, soda 3-09, potash 0*80, 

 phosphoric acid 0-18, loss by ignition 0-44 = 100-67. J. d. d. 



2. Mastodon or Elephas with fragments of charcoal at Attica, 

 Wyoming Co., N. Y. — The Report for 18S7 of the State Museum 



of New York, contains an account, by Professor J. M. Clarke, of 

 the discovery of bones at Attica, including a tusk and ribs, and 

 a portion of the zygomatic arch, associated with fragments of 

 charcoal and a piece of pottery. They were obtained from a bed 

 of unlaminated clay, 1 foot 5 inches thick, lying beneath, 1 foot 

 7 inches of clayey muck and loam and 2^ feet below the natural 

 surface. Another place, about one hundred yards distant, char- 

 coal and the pottery were found at the bottom of a deep accumu- 

 lation of muck, under which was a bed of compact clay. The 

 depth below the natural surface of the ground was four feet. The 

 vegetable mould was continuous between the two localities. 



3. Illustrations of the Fossil Fishes of the Devonian Rocks 

 of Canada ; by J. F. White aves, F.G.S. Part II. Descriptions 

 of species from the Upper Devonian rocks of Scaumenac Day. 

 20 pp. 4to, with plates V to X. Montreal, 1889. Trans. Roy. Soc. 

 Canada, vi. — Part I of Mr. Whiteaves appeared in 1887. This 

 second part describes and finely figures the species Glyptolepis 



Quebecensis, Eusthenopteron Foordi, Cheirolepis Canadensis, 

 Dothriolepis Canadensis, Acanthodes affinis, Phaneropleuron 

 curtum, Cephcdaspis Campbelltonensis, Coccosteus Acadicus, 



Ctenacanthus latispinosus, Homacanthus gracilis. 



In the Annals and Magazine of Natural History for August, 

 p. 183, Mr. A. Smith Woodward remarks that the species of 

 Ctenacanthus and Homacanthus are in every respect closely like 

 the spines of the Acanthodian genus Climatius, as elucidated by 

 Egerton and Powrie, and names them provisionally Climatius 

 latispinosus. 



4. Brief notices of some recently described minerals. — Michel- 

 levyte. Barium sulphate crystallizing, according to the deter- 

 mination of A. Laceoix, in the monoclinic system. It occurs 

 in lamellar masses in a crystalline limestone near Perkins' Mill, 

 Templeton, Quebec. Three cleavages are noted: a (100) easy, 

 also b (010, plane of symmetry) vitreous, and c (001) ; the angles 

 are ab=bc=90°, ac=77°-78°. Polysynthetic twinning, with a 

 as the twinning plane, gives rise to numerous hemitropic bands 

 observed on b. The optic axial plane is normal to b, and the 



