GUELPH FAUNA IN THE STATE OF NEW YORK 185 



Calymmene niagarensis Hall 



Page 107 



FIG. 



12 Cephalon from the Guelph at Rochester, x2 



Proetus sp. 



Page 108 



13 Cranidium, from a gutta-percha squeeze of a natural impres- 



sion. x2. Rochester 



14 Another, smaller cranium. X3 



15 Small pygidium, retaining partially the test. X2 



16 Largest pygidium observed. X2 



Originals of fig. 14-16 are from the Upper Shelby bed 

 (N. Y. State Museum). 



