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ENTOMOSTRACA OF MINNESOTA. 319 
ing claw, with two short soft sete springing from its base. The entire 
claw somewhat longer than the last three segments conjointly. 
‘‘Caudal rami long and slender, slightly sinuate, the transverse 
diameter of each not more than one-twentieth its length; the basal 
fifth, however, considerably thickened. Rami smooth, except poste- 
riorly, where the margin is closely set with stout, short spines, length- 
ening toward the distal end of the ramus. Terminal claw slightly 
curved at the tip, contained two and a half times in the length of its 
ramus. Subterminal claw nearly two-thirds the length of the terminal, 
also slightly curved. Claw-like seta almost immediately above the 
latter, more slender, but two thirds its length. Besides the above, a 
short slender seta springs from in front of the base of the termina] 
claw. 
‘The first and last segments of the second pair of legs sub-equal, 
each two-thirds the length of the second; basal segment straight, its 
length five times its width, with three slender set, one borne upon the 
middle of its exterior side, and two near the apex, opposite each other. 
Second segment slightly curved, with a single slender seta near the 
apex, on its outer margin. Third segment with two terminal sete, 
one nearly straight, claw-like, about three-fourths the length of its 
segment, and the other curved and blunt.’’ 
Habitat: Yellowstone River, Yellowstone Park, Wyoming (8. A. 
Forbes); (?) Minnesota (Herrick). 
To my mind Candona ornata Herrick belongs here. But since the 
figure given by Professor Herrick is about all I have to base my 
Opinion upon, it is not thought wise to enforce this opinion upon the 
public. 
GENUS CYPRIS O. F. Miller, 1785. 
In both sexes the antenna is five-jointed. The natatory sete on the 
third extend to the tip of the terminal claws. 
The mandibular palp does not extend beyond the tip of the man- 
dibular teeth. 
The branchial plate of the first maxilla is large, bearing stiff, plu- 
mose sete. The first mandibular process is armed with two biarticu- 
late thorns. 
The second maxilla bears a branchial plate. 
The second foot resembles that of Cypridopsis. 
The abdominal ramus is stout, and terminates with two more or 
less stout claws, in front of which occurs a short and behind which a 
long seta. 
Males are unknown; propagation parthenogenetic only. 
