148 



Contributions to Palaeontology. 



CONOCEPHALITES WINONA ( n. s.). 

 PLATE II. FIGS. 26-28. 



Compare Conocephalites chippewaensis (= ? Lonchocephalus chippewaensis, 

 Owen); Shumard in Trans. Ac. Sciences of St. Louis, Vol. ii, p. 164. 



Head small. Glabella cylindrico-conical, sides gently 

 curving towards the front which is regularly rounded, 

 sharply truncate behind by a straight narrow occipital 

 furrow : glabellar furrows obscure or obsolete. Occipital 

 ring rounded lower than the glabella, narrow at the sides, 

 and produced in the middle. Dorsal furrow abrupt, 

 strongly defined at the sides and little less strongly 

 in front : cheeks abruptly rising from the dorsal furrow, 

 rounded above, and extended in the direction of the 

 palpebral lobe. Frontal limb a little depressed below 

 the plane of the cheeks adjacent to the glabella, and 

 marked by a sharp transverse groove which is little less 

 distinct than the dorsal furrow : and anterior to this the 

 margin is elevated as high or higher than the part behind 

 the groove. A slight central longitudinal groove or 

 depression extends across the posterior part of the frontal 

 limb, from the dorsal furrow to the frontal furrow. 



Associated with numerous specimens of the glabella 

 and fixed cheeks are many fragments of movable cheeks, 

 and one or two nearly entire. The cheek is small, rather 

 flat, with a strong thickened rounded border, which is pro- 

 longed into a spine as long as the body of the cheek. Eye 

 large, semilunar, and abruptly elevated from the cheek. 



Caudal shield (of this species?) nearly semielliptical, a 

 little curved on the anterior margin : axis abruptly elevated, 

 rounded, marked by about five ambulations including the 

 terminal one. Lateral lobes depressed convex, having 

 three flattened simple ribs besides the anterior one, all 

 terminating in a narrow flattened border. 



