538 
FIG. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig, 
Fig. 
2 
3. Sixth endite of 2d foot, from Texas, x 50. 
4. 
5 
6 
GEOLOGICAL SURVEY OF THE TERRITORIES. — 
EXPLANATION OF PLATE XII. 
STREPTOCEPHALUS TEXANUS Packard, details. 
First foot, male from Kansas, X 4 A. 
First foot, male from Texas, x 50 diameters. 
Sixth endite of 9th foot, from Texas, x 50. 
. Tenth foot of specimen from Kansas, xX 50. 
. Eleventh foot of specimen from Kansas, x 50. 
7. 
End of body of specimen from Kansas, X 30. 
Drawn by the author, with the aid of the camera lucida. 
