130 
7. Bucania (Tremanotusl) Bue/li, Whitf 
(?. Bucania sulcatma, Emmons. 
g. " bidorsata, Hall. 
70. Cyrlolites compressus, Conrad. 
//. Eunema slrigillatum, Salter. 
12. Helicotoma planulata, Salter. 
I j. Trochonema umbilicatum, Hall. 
14. Madurea Manitobensis, Whiteaves. 
IJ. Loxonenia Winnipegense, N. sp. 
16. Fusispira ventricosa, Hall. 
Of these, Loxonema Winnipegense is the only new form to Science, 
" The species is of considerable interest " Mr. Whiteaves remarks, " on 
account of its striking and close similarity to some of the most typical 
Jurassic species of Pseudomelania." The large operculum which was 
found associated with the Madurea Ma?iitobe?isis, Whiteaves, (Trans. 
Royal Society Canada, vol. VII., Sect 4., p. 75. pis., XII and XIII figs. 
1 and 2.,) is of interest, in that it does not possess a muscular process such 
as is seen in the operculum of Madurea Logani, Salter of this district. Of 
the sixteen species recorded, no less than eleven are forms which were 
more or less abundant in the old Cambro-Silurian seas about Ottawa, 
and whose remains we now find imbedded in the rocks of old Barrack 
Hill, of Hull and of the Black River and Trenton formations of the 
Ottawa Valley generally. The fauna as exemplified in the gasteropoda 
appears to be nearer Black River than Trenton, although the two belong 
to one and the same period in the history of this portion of the North 
American Continent. H. M. Ami. 
Report of the U. S. National Museum, under the Direction of the Smithsonian 
Institution, for the year ending June 30th, iSo. 
This volume of 800 pages contains a most interesting collection of 
reports and scientific papers. In addition to the reports of the Assistant 
Secretary and of the Curators of the several departments of the Museum, 
there is a series of most valuable papers, discussing and illustrating the 
