132 Reports & Proceedings—Geological Society of London. 
and is a really noble monument to Mr. Fox-Strangways, who did so 
much for Yorkshire geology. Mr. Sheppard has performed his share 
well, and thanks are especially due to him for undertaking so heavy 
an addition to his many burdens. We only wish so excellent an 
example will have imitators in many other of our county societies, 
for bibliography is a very sure and certain method of helping others 
and preventing duplication of work. 
XI.—Sitvrran or tHE Lower SasxarcHewan.—From the Grand 
Rapids, from Cedar Lake, and from cuttings along the recently 
constructed Hudson Bay railway, various Silurian horizons are 
reported on by Dr. E. M. Kindle (Oct., 1915, Canada Geol. Surv. Mus. 
Bulletin, No. 21). Among Brachiopods two new species of Leptena 
(LZ. sinuosa and L. parvula) are described from beds of late Silurian 
age, equivalent to the Stonewall Limestone. A dolomite near the 
base of the Silurian at Grand Rapids abounds in Conchidium decus- 
satum. The numerous ventral valves of this Pentamerid show 
variation in three well-marked directions, but intermediate forms are 
so numerous that no distinct varieties can be recognized. In a word 
the variation appears continuous. The spondylium reaches approxi- 
mate maturity at an early stage, but the radiating folds continue to 
increase in strength and number down to extreme old age. 
REPORTS AND PROCHHDIN GS. 
I.—GeronogicaL Socrery or Lonpon. 
1. December 15, 1915.—Dr. A. Smith Woodward, F.R.S., President, 
in the Chair. 
Dr. Aubrey Strahan, F.R.S., gave an account of a deep boring 
which was made in 1918 in search of coal, in the parish of Little 
Missenden, at an elevation of 459 feet above sea-level. The collection 
of specimens and the identification of fossils was carried out by 
Mr. J. Pringle. For the first 1,200 feet the hole was punched, and 
nothing is known of the strata traversed down to that depth—beyond 
the fact that the boring started in the top of the Middle Chalk and 
passed through some Oxford Clay and, below that, some oolitic 
limestones which presumably belong to the Great Oolite Series. 
From 1,200 feet the hole was drilled for 64 feet, and cores were 
preserved. The cores consisted of alternations of limestone and mud- 
stone, with a rich and characteristic Upper Ludlow fauna. Among 
the fossils was Orthoceras damesi, Roemer [? Krause], which had not 
previously been obtained in this country. 
The boring serves to fix part of the northern boundary of the tract 
of Old Red Sandstone which underlies London. It is intended to 
publish a full account in the next issue of the Summary of Progress 
of the Geological Survey. 
