bY 
134 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. 
Canthocamptus hibernicus Brady. 
PLATE L, FIGS. 8, 4. 
A small species differing from all others save the next in having a 
three-jointed inner ramus of the fourth foot. 
‘‘ Anterior antenne of the female slender, eight-jointed, about as 
long as the first body segment, and much like that of C. minutus. In- 
ner branch of the second antenna very small, one-jointed. Posterior 
foot-jaw having a broad hand armed with a long apical claw. Inner 
branch of the first pair of feet scarcely twice as long as the outer; first. 
joint longer than the entire outer branch, and nearly twice as long as 
the united second and third joints, both of which are extremely small. 
Inner branches of the second, third and fourth pairs shorter than the 
outer, and three-jointed, the first joint being very small. Inner seg- 
ment of the basal joint of the fifth pair of feet in the female elongated, 
fringed, bearing two long and three short apical sets; second or outer 
joint sub-ovate, finely fringed internally; externally bearing six long 
marginal sete. In the male the limb is smaller, the basal joint short, 
broad and having six short setz of equal length; second joint nearly 
like that of the female. Caudal segments somewhat longer than 
broad; inner seta about twice as long as the outer; anal operculum 
denticulate. Length 0.65 mm.’’ Not found in America. 
Canthocamptus palustris Brady. 
PLATE L, Fia. 5. 
A braeckish-water species about 0.9 mm. long, found in a number 
of places in the British Isles. The species presents several anomalies. 
The antenne of the female are eight-jointed; those of the male 
robust, the last joint forming a hook. The first four pairs of feet 
have both branches three-jointed; the fifth pair in the female are two-. 
jointed, with a short and broad basal joint, the second joint being sub- 
ovate, bearing five long apical sete; in the male the fifth pair is 
obsolete, being reduced to a minute setiferous lobe. Caudal segments 
short, bearing two principal sete, the outer half as long as the inner. 
Canthocamptus borcherdingii Poppe. 
Poppe ’89. 
The female is 0.64 mm. long. Caudal margins of cephalothoracie 
segments unarmed, but in the middle of each segment a transverse 
line of spinules. Abdominal segments spined beneath. Anal opercu- 
lum with eleven teeth. Stylets short with two short unpectinate sete, 
the inner half as long as the body while the outer is one-fourth. An- 
tenn eight-jointed, shorter than the first segment. Mandiblar palp 
