Review of Recent Geological Literature. 4ii'.i 
de St. Petersb., rth ser., vol. xi.ii. No. 5, pp. it:;, pi. 1 6, 1894.) This 
continuation of the author's elaborate stud} of the Silurian trilo- 
bitic faunas of Russia embraces the consideration of 38 species and va- 
rieties of 13 genera and subgenera belonging to the families mentioned. 
Fourteen of the species and varieties are new. A precise redefinition of 
the genus Calymmem (the author follows Lindstrom in the adoption of 
the double m) restricts ii to forms with rounded genal angles, cephalic 
margin without serrations, glabella reaching the anterior border and 
bearing 3-5 pairs of lobes, thoracic pleurae with triangular articulating 
surfaces, pygidial pleura? 5 on each side (type, C. tuberculoid Brun- 
nich i. This limitation of the genus opens the way for the employ menl 
of Oorda's term Pharostoma for a subgeneric division, to include species 
having the genal extremities produced into spines, border of the glabella 
toothed, glabella short, not reaching the anterior border and with 2 
pairs of low lobes on each side, dorsal furrows with a pi I at each anteri- 
or extremity and a subcircular expansion behind, and thoracic pleurae 
without triangular articulating surfaces. A single new term is intro- 
duced in a similar capacity, thai is, as a subgenus of Calymmene, viz.: 
Ptychometopus, fur i he species C. tolborthi, now, which is characterized 
by elevated ridges extending alone- the anterior facial sutures to the 
anterior subm#rginal groove. Of the species described G belong to Ga- 
lymmene, '■', to Pharostoma, 1 to Ptychometopus, '■'< to Brontt us, s to Proetus, 
l to Gyphaspis, 1 to Menocephalus, 1 to llarpides, 'i to TIarpes, 1 to Tri- 
nucleus, .") to Ampy.v, 3 to Remopieurides, and 1 to Agnostus. 
Geological Survey of Canada, Annual H> port (new veriest), vol. V, for 
1800-' 91. Ai.FiiKD R. ('. Ski.wyn. ('. M. <i.. Director. Two parts, con- 
taining thirteen reports; pp. xlvi, 1521, with 58 plates (34 being maps, 
seci ions and views; and 2 1 statistical diagra ms of the mineral resources 
of Canada!. Ottawa. 1893. rn this very comprehensive yearh report 
much varied information is presented, concerning the geology, topog- 
raphy and natural resources of various parts of Itrhish America ill • 
which special explorations havo been in progress. The summary reports 
of the work-ol the survey during 1890 and 1891, in the director, occupy 
1 ?8 pa lies. 
Mi-. 1!. <;. MoConnell next has a report of 6/ pages on the portion of 
the District of Athabasca between the Peace and Athabasca rivers 
north of Lesser Slave lake. Devonian limestones on these risers dip 
prevailingly three or four feet per mile northward, and are apparently 
succeeded conformably by the Cetaceous series. 'The vasi interval of 
time between these periods is. so far as observed, unrepresented, either 
bj deposition or erosion, from which the area is thought to have been 
during all that time the lied of an abj ssal ocean, loo far from its shores 
to receive appreciable sediments. The Cretaceous section ranges-from 
the Dakota up to the Laramie, the former being represented l>\ the pe- 
culiar Tar sands, 140 to 225 feci thick, which have become saturated 
with bituminous matter rising from somewhat deeply underlying De- 
vonian strata. "The Tar sands evidence an upwellingof petroleum to 
