Recent Publications. 211 
Engineers, Baltimore meeting, February, 1892, 12mo, cloth, pp. 189. 
Issued by the Local Committee. 
Besides the usual announcements and descriptions of the institutions 
of the city this volume contains a concise account of the geology of Bal- 
timore and its vicinity, with two geological maps, based on excellent 
contoured maps by the U. 8. Geological survey (‘‘ Baltimore sheet”). The 
crystalline rocks are described by Dr. Williams, and the physiography 
of the origin and geology of the sedimentary rocks by N.H. Darton. It 
makes a very useful and valuable compend fer the general student of 
the region. 
Description of a new species of Panenka from the Corniferous Limestone 
of Ontario, by J. F. WHITEAVES.—(Can. Rec. Sci. Vol. IV, No. 8, Oct., 
1891. pp. 401-404, with plate.) 
Panenka grandis, the species described was collected at St. Mary’s, 
Ontario. The specimen figured is six inches and four-tenths in length, 
and four inches and two-tenths in hight. 
Note on the Occurrence of Paucispiral Opercula of Gasteropoda in the 
Guelph Formation of Ontario, by J. F.Wutreaves. (Can. Rec. Sci. Vol. 
IV No. 8, Oct. 1891. pp. 404-407.) 
A specimen figured has a length of 20 mm. and a breadth of 16 mom. 
They resemble the opercula of Litorina and Natica, and the conjecture 
is hazarded that they may belong to Holopea gracia or H. harmonia, of 
Billings. 
Short Notes on some Canadian Minerals, by W. F. FERRIER. (Can. Rec. 
Sci.Vol. [V, No. 8, Oct., 1891. pp. 472-476, with plate.) 
The minerals noted are native arsenic from near Thunder bay, lake 
Superior, molybdenite from Labador; sphalerite or blende, from Bauce 
Co., Quebec; particularly fine crystals of pyrite; martite from Lanark 
Co., Ontario; kermesite from Haut Co., Nova Scotia; quartz crystals 
with concave faces; black sp/nc/ from Ottawa Co., Quebec; anhydrite 
and gypsum from the Laurentian crystalline limestone of Lanark Co., 
Ontario. 
RECENT PUBLICATIONS. 
I. State and Government Reports. 
The following bulletins of the United States Geological Survey have 
recently been issued: No. 62: The Greenstone-Schist Areas of the 
Menominee and Marquette Regions of Michigan, by G. H. Williams; 
No. 65: Stratigraphy of the Bituminous Coal Field in Pennsylvania, 
Ohio, and West Virginia, by I. C. White; No. 67: The Relations of the 
Traps of the Newark System in the New Jersey Region, by N. H. Dar- 
ton; No. 68: Earthquakes in California in 1889, by J. E. Keeler; No. 69: 
A Classed and Annotated Bibliography of Fossil Insects, by 8. H. Seud- 
der; No. 70: Report on Astronomical Work of 1889 and 1890, by R. 8. 
Woodward; No. 71: Index to the Known Fossil Insects of the World, 
inciuding Myriapods and Arachnids, by 8. H. Scudder; No, 72; Altitudes 
