Keokuk Group at Crawford sville^ Ind. — Beachler. 407 
Feet. Inches. 
Anterior sacral vertebra: length of centrum 2.69 
" " " breadth " 3.69 
" " " hight " 3.56 
" " " length of spinous process* 2.75 
" " " " rib 3.94 
" '• " horizon, diam. of rib at neck (about) . . 1.00 
" " " vertical " " diapophysis at 
articulation with rib 2.37 
" " " horizontal diameter of diapophysis 
at articulation with rib 1.75 
Length of one of the swimming-paddles, partially restored 
and including femur ( ? humerus), about 4 5.50 
Breadth of same across base of intermedium 8.20 
" " " tenth phalanx from tip of third digit. .. 3.13 
Length of femur ( ? humerus), about , 1 7 00 
•Greater and lesser diameters of shaft of a femur (? humerus) C ^-^^ 
at point where latter is most nearly cylindrical, respectively . , 1 ^[J^ 
Thickness of femur ( ? humerus) at distal extremity 2.63 
Breadth of same at distal extremity 9.50 
( 5.27 
Greater and lesser diameters of head of same, respectively ] and 
( 4.52 
€ircumference of neck of same 1 1.75 
Greatest length of tibia ( ? radius) 3.44 
" breadth of same 4.63 
" length of fibula (? ulna) 2.30 
" breadth of same 3.OO 
A fuller paper on this form, with illustrations, will appear in 
the Bulletin of the Washburn College Laboratory of Natural 
History, Topeka, Kansas. 
KEOKUK GROUP AT CRAWF0RD5VILLE, INDIANA. 
By Chas. S. Beachler. 
The rocks of the Keokuk group, consisting of soft sand- 
stones, limestones and clay shales, occupy the entire central 
area of Montgomery county, Indian^i, extending in a broad belb 
from north to south across it. They are everywhere, except 
along the streams and hillsides, hidden and covered with glacial 
•deposits from one to one hundred and fifty feet in depth. In 
drilling for natural gas the drill penetrated two hundred and 
eighty feet of shales and limestones of this formation before 
reaching the shales of the Devonian. The following section 
was observed at the crinoid beds: 
