DESCRIPTION OF A NEW SUBTERRANEAN AMPHIPOD 
FROM WISCONSIN. 
S. J. HOLMES. 
(With Plates VI and VII.) 
Crangonyx putealis sp. nov. (Plate VI). 
Body slender; side plates low. Eyes absent. First anten¬ 
nae about half the length of the body, the second joint of the 
peduncle a little shorter than the first, the third about two- 
thirds the second; flagellum longer than the peduncle; second¬ 
ary flagellum consisting of two joints. Second antennae a lit¬ 
tle over half the length of the first, the last two joints of the 
peduncle subequal; flagellum but little longer than the last 
joint of the peduncle and consisting of five or six joints. 
First gnathopods stout; hand nearly as broad as long, dis- 
tally widened, the palm oblique and armed with several short 
spines, each of which bears a single seta in a terminal notch; 
posterior margin devoid of setae. Second gnathopods longer 
and relatively more slender than the first; hand narrowly ovate 
with very oblique palm armed with notched spines, a long spine 
at upper end of palm; posterior margin, except near the upper 
end of the palm, devoid of setae. 
First pair of uropods extending beyond the others, the rami 
subequal, a little shorter than the peduncle, and armed with 
two spines on the upper margin and a cluster of three or four 
spines at the tip. Peduncle of the second uropods with a spine 
at the distal end of the upper margin; inner ramus about as 
long as the peduncle, armed with about three spines on the up¬ 
per margin and three or four at the tip; outer ramus a little 
