144 



Contributions to Palozontology . 



The entire length of the head of a large specimen is 0.65 of an inch. 



One of the smaller specimens has the entire length of head 0.11 of an inch. 



This description of the species is taken from numerous specimens 

 obtained at Trempaleau ; while a single specimen from near La- 

 crosse ( Plate hi, f. 31), with the same proportions, has the glabella 

 more bent downwards in front, and the sides are more indented by 

 the furrows, only two of which are distinctly seen. The fixed cheeks 

 are precisely as in Trempaleau specimens. 



A separate cheek, apparently of this species, is subtriangular, 

 depressed convex, a little prolonged in front and apparently obtuse 

 behind, with a thickened border and small eye. 



A pygidium, associated with these specimens, is short and wide, 

 with a strong prominent axis, which has three distinct annulations 

 besides the anterior one, with two or three distinct ribs on the lateral 

 lobes. The entire width is 0.47 of an inch, and the length 0.21; 

 the axial obe being 0.19 of an inch wide. 



CONOCEPHALITES ASTATIOTS ( n. s.). 



PLATE II, FIGS. 34 & 35 ; AND PLATE III, FIG. 29. 



Glabella depressed-convex, subovate-conical, slightly 

 subangular along the middle, rounded anteriorly, the 

 sides curving, the base nearly straight, length a little 

 greater than the width at base. Furrows shallow and 

 often indistinct : occipital furrow narrow and shallow ; 

 occipital ring comparatively wide, flattened on the top, 

 a little higher than the base of the glabella ; dorsal fur- 

 row shallow, and continued in front of the glabella. 



Facial suture making a gentle curve outwardly from 

 where it cuts the contour in front, and thence nearly 

 straight to the anterior margin of the palpebral lobe, 

 and slightly curving outwards again returns beneath 

 the eye, almost to the dorsal furrow, and then turns 

 very abruptly outwards. 



Length of glabella , 



Width of glabella at base. 

 Width of glabella in front. 

 Length of frontal limb.... 



0.35 

 ,0.37 

 0.18 

 .0.12 



