520 Reviews—Prof. A. Pavlow—Secondary Rocks of Russia. 
Only one species was collected in this locality, viz. Placenticeras 
glabrum, n.sp. 
(4.) From the Fort Pierre Group of the Later Cretaceous Rocks 
of the Saskatchewan and its tributaries; collected by J. B. Tyrrell 
in 1885 and 1886. 
From this locality the following species were obtained, some of 
which were described in Mr. Tyrrell’s Report in the Annual Report 
of the Survey for 1886 (vol. ii. new series, pp. 153-163 E), but 
without figures, a want which is here supplied :— Pteria linguiformis, 
var. subgibbosa, Meek, Inoceramus Sagensis, var. Nebrascensis, Owen, 
I. Vanuxemi, Meek & Hayden, Gervillia recta, var. borealis, Whit- 
eaves, Tancredia Americana, Meek & Hayden, Cyprina ovata, 
M. & H., Cyprina subtrapeziformis, Whiteaves, Protocardia sub- 
quadrata, Evans & Shumard, Protocardia borealis, Whiteaves, 
Linearia formosa? Meek & Hayden, Pholadomya subventricosa, 
M. & H., Liopistha undata, M. & H., Solecurtis (Tagelus) occidentalis, 
Whiteaves, Martesia tumidifrons, Whiteaves, Hydatina parvula, Whit- 
eaves, Lunatia concinna, Hall & Meek, sp., Baculites ovatus, Say, 
B. grandis, Hall & Meek, B. compressus, Say, Scaphites nodosus, 
Owen, Placenticeras placenta, Dekay, sp., Paleastacus (?), ornatus, 
Whiteaves, Tooth of a Selachian. 
(C.) ‘ From Manitoba.” 
From the Niobrara-Benton Formation of the Later Cretaceous in 
the Duck and Riding Mountain District. Here the following species 
have been collected:—Serpula semicoalita, u.sp., Lingula sub- 
spatulata (?), Hall & Meek, Ostrea congesta, Conrad, Anomia obliqua, 
Meek & Hayden, Inoceramus problematicus, Schlotheim, Modiola 
tenwisculpta, n.sp. (?), Belemnitella Manitobensis, n.sp., Loricula Cana- 
densis, n.sp., Ptychodus parvulus, n.sp., Lamna Manitobensis, u.sp., 
Enchodus Shumardi, Leidy, Cladocyclus occidentalis, Leidy. 
ALOR, 
IIJ.—Nores on THE Jurassic AND CRETACEOUS STRATA OF Russia 
AND Hwenanp. By Prof. A. Paviow. 
ErupEs sur Les CovucHEes JURASSIQUES ET ORETACEES DE LA 
Russiz. J. JurassiquE Supérieur ET Oritackt InririeuR DE 
LA RUSSIE ET DE L’ANGLETERRE. Par le Prof. A. Paviow. 
Bulletin de la Soc. Imp. de Moscow, 1889, No. 1, pp. 61-127, 
176-179, Pls. II., ITI., IV. 
ONFLICTING opinions touching the relative age and position 
of a series of strata in the higher portion of the Jurassic and 
the lower portion of the Cretaceous in the Hast of Russia, have for 
a long time existed among Russian paleontologists, and curiously 
enough the question as to the proper correlation of the strata on the 
same horizons in this country is still a debated point, as shown in 
the excellent paper “On the Subdivisions of the Speeton Clay,” 
brought recently before the Geological Society by Mr. G. W. Lamp- 
lugh. Prof. Pavlow has studied for many years the Russian beds, 
developed more particularly near Simbirsk on the Lower Volga, and 
in the neighbourhood of Moscow, and last year he made a personal 
