1 6 Calcifesoi's of the Mohawk Valley 128 



Glabella small, gradually increasing in size from front to 

 back, very convex, with two pairs of rather obscure lateral fur- 

 rows. Cheeks depressed, sloping abruptly to the margin. Genal 

 angles produced into sharp spines which are more than two-thirds 

 as long as the glabella. 



Eyes oblong, situated very far anteriorally, opposite the an- 

 terior one-sixth of the glabella, less than }^ mm. in length. 



Thorax and pygidium unknown. 



Locality. — No. IV 2 of the Ft. Hunter secftion. 



ASAPHUS Dalman 

 Asaphus canalis (?) Conrad PI. 16 figs. 7, 8 



A. M. N. H., Bull., vol. I, p. 336, pi. 34; vol. 2, p. 64, pis. 11. 12. 



Several pygidia and free cheeks and one glabella of a species 

 closely resembling A. canalis have been referred to that species. 



The description is as follows: Cheek large, triangular in 

 outline, projecfbing backward at the genal angle into a long, thick 

 spine. The spine is rounded, but the thickening becomes more 

 angular as the front of the cheek is approached. Length of 

 largest cheek from the anterior to the end of the spine about 50 

 mm.; from the .suture line below the eye to the margin 18 mm. 

 Eyes prominent; the longest diameter 5mm. 



Pygidium large, serai-circular, with a wide doublure; obscure- 

 ly trilobed or almost perfecftly convex, anterior margin nearly 

 .straight, axial lobe narrow, marked in one specimen by eight ob- 

 scure annulations; in some specimens only four or five can be dis- 

 tinguished. In the pygidium of one large individual the axis is 

 depressed. Size varies greatl}^, from 10 ram. in width and 7 mm. 

 in length for the smallest and 50 mm. in width and from 38 to 40 

 mm. in length for the largest. 



Locality. — No. V 2 of the Ft. Hunter section; not uncommon. 



Asaphus convexus,? PI. 16 fig. 9 



Pygidium semi-circular, convex, sloping evenl}^ to the lateral 

 but sharply to the posterior margin. Doublure strong but not so 

 marked as in A. canalis ox gigas. Axis broad, not strongly 

 arched, tapering to a ver}^ obtuse termination; only three inde- 

 stinA annulations can be distinguished. Varies in size from 7 

 mm. by 5 ram. to 21 mm. by 15 mm. Probably a new species. 



Locality — Found in No. IV of the Ft. Hunter secftion. 



