22 Meek and Worthen on a Scorpion and other fossils 
of the dorsal half of each thoracic segment more pong : 
-* 
= 
is 
q 
ae 
3 
4 
Another specimen, from the black shale of the Coal-measures 
rtunately it is not in a condition to show 
cepha : to be sub-quadrangular in form, 
coment wider (behind) than long, the breadth being about 
e 
ocelli, nor can we see whether or not its anterior edge is emar- 
ginate. Its posterior edge has a very slender, minutely ¢ 
o1 W 
re- 
nate, raised marginal line, from a little in advance of hich 
z 
* 
