140 



Contributions to Palceontology. 



size. Numerous specimens of considerably larger size than the 

 ordinary forms at Kickapoo have been found at Marine mills on the 

 St. Croix river, associated with C. oweni. 



CONOCEPHALITES NASUTUS ( n. s.). 

 PLATE II. FIGS. 3-9. 



A small species with a somewhat broad head. Glabella 

 short, truncate-conical, somewhat abruptly convex, the 

 length equal to the width at its base ; the posterior and 

 middle furrows oblique, and somewhat deeply marked; 

 the anterior one near the front of the glabella, and often 

 inconspicuous in small individuals. Occipital furrow 

 somewhat wide and deep, straight in the middle, making 

 a slight curve backwards, and thence forward at the 

 extremities: occipital ring rather broad in the middle 

 and narrower at the sides. Dorsal furrow linear, well 

 defined, and extending with the same strength in front 

 of the glabella, which rises abruptly, while the cheeks 

 are nearly flat. 



Fixed cheeks narrow, elevated in the direction of the 

 palpebral lobe : posterior limb narrow triangular : frontal 

 limb extended, scarcely convex, and sloping downwards 

 from the glabella for two-thirds the length, where it is 

 marked by a transverse furrow, beyond which it is con- 

 tracted at the sides, a little convex in the middle and 

 attenuated towards the anterior margin. 

 The movable cheek (of this species?) somewhat elon- 

 gate, gradually narrowing to the posterior extremity, which 

 is produced into a lightly curved spine of moderate length. 

 The facial suture reaches to the base about one-third the 

 distance from the marginal rim to the eye. 



This species is abundant in the gray and ferruginous sandstone 

 of Kickapoo. It is pretty uniform in its characters, and easily 

 recognized by the pinched and nasute anterior portion of the fron- 



