40 



KANSAS Academy of Science. 



Loc, Kansas. Coll. R. Hay. 



Figs. 6 and 7, natural size. 



There are no lines of abdominal 

 tubercles, only low, broad, longi- 

 tudinal swellings on either side of 

 the depressed central zone of the 

 abdomen, and the nodes on the 

 sides are large and prominent, as 

 in other species of this genus. 

 The sides, however, are narrow and 

 slightly concave, and internally a 

 ridge is formed, on account of the 

 suddenness with which they in- 

 cline to the umbilicus at the dorsal 

 shoulders. 



imMS€:-'li,'-. 



Fig. 7. 



"^^^#'■1"^??'?^--^ 





\-r '■'■■,)<!'.' 



Fig. 8. 



Fig. 9. 



Metacoceeas Hayi, n. s. 



Loc, Kansas. Coll. R. Hay. 



Figs. 8 and 9, natural size. 



This cast has broad, flattened sides, having angular, umbilical shoulders where the 

 sides descend abruptly to the umbilici. There is an outer row of tubercles on the 

 edge of the abdomen. These are elongated longitudinally, and the depressions be- 

 tween them are often very distinct; the surface of the cast is otherwise smooth. The 

 sutures have short and very broad lateral lobes, with saddles at the umbilical shoul- 



