Poi7it Levi Fossils. 323 



rounded in front, sides nearly straight or gently convex, neck 

 furrow well defined all across, and continued on the cheeks to 

 the outer angles of the head, four lobes on each side of which 

 the anterior is largest, the posterior smallest, and the other two 

 almost equal to each other, the furrows directed obliquely for- 

 wards at an angle of about 30°, to the longitudinal axis, their 

 inner extremites distant from each other a little less than one- 

 third the width of the glabella. Cheeks moderately convex, 

 punctured. Eye opposite the second lobe from the front, and 

 distant from the glabella apparently about the width of the lobe. 



Length of head nearly four lines ; of glabella, about three lines 

 and a half; width of glabella two lines and a half. 



Limestone, No. 2. 



Closely allied to a small species which occurs in the Chazy 

 limestone at Caughnawaga, Another of the same size and type 

 occurs at Phillipsburgh. 



AsAPHUS Illaenoides. N. s. 



Description. — Head very convex, in shape like that of an 7Z- 

 laenus, equal to about one-fourth of a sphere, posterior angles 

 rounded ; width a little less than twice the length. Glabella ob- 

 scurely defined, oblong, slightly narrowed just behind the eyes, 

 thence a little widened both forwards and backwards. Eyes sub- 

 globular, of a medium size, close to the glabella, the distance 

 between their centres about equal to the length of the head. 

 The facial suture runs from the inner anterior angle of the eye, 

 with a scarcely perceptible curve outwards, directly forward to 

 the front margin, being in this part almost parallel with the lon- 

 gitudinal axis of the body. From the inner posterior angle it 

 runs outwards aud backwards, and cuts the margin at a point 

 in a line drawn parallel with the axis of the body, passing out- 

 side of the eye at a distance therefrom equal to one-half the 

 width of that organ. The cheeks from the eye to the posterior 

 angle of the head, descend with a flat slope of about 45° to the 

 horizontal plane of the body. The surface appears to be smooth. 



The pygidium is depressed, convex, semicircular, the posterior 

 margin regularly rounded ; the axis depressed, semi-cylindrical, 

 sub-conical, sides a little concave rather prominent, the extremity 

 very obtusely rounded, the length varying from a little more 

 than one-half to two-thirds the total length ; its width a little 

 less than that of the side lobes, five very obscure segments of 



