w 
, 7 ” 7 ~ 2 
. Micmacea van Ingeni, nu. sp., Mag. 7 
PLATE “XE. “ERROBIPA. 
a. Middle piece of the head 
shield b. Samein profile. From 1, b, 3, Hanford Brook. See p. 142. 
Micemacca (?) plana, un. sp., Mag. 2 a. Middle piece of the head shield 
b. Same in profile. From 1, }, 3, Hanford Brook. See p. 148. 
Protolenus ( Bergeronia) clegans Matt., Nat. size a. Middle piece of 
the head shield b. Movable cheek c. Head in profile d, 
Joint of the thorax ——e. Same in profile. From Diy. 1, }, 2, Han- 
ford Brook. See p. 147. 
““Olenus’’ Zoppii Mgh. Of the Cambrian of Sardinia, supposed to be a 
derivative from the same stock as Protolenus. 
