144 General Notes. [February, 



Palesmonetes cxilipes Stimpson. — (Paleswonetes exilipcs Smith, 

 S. I., loc. cit, 641 ; Forbes, S. A., loc. cit, 5.) I have collected 

 this species in tributaries of the Tombigbee and Noxubee rivers, 

 in Eastern Mississippi, in the Mississippi river at Memphis, in 

 Pearl river at Jackson, and in the Chickasawha river at Enterprise, 

 Miss. It is now known to occur as far north as Ecorse, Mich., in 

 South Carolina and Florida, in Mississippi and in Illinois. 



Crangonyx lucifugus, n. sp. — This is a small, rather elongated 

 species, that was obtained from a well in Abingdon, Knox county, 

 Illinois. As befits its subterranean mode of life, it is blind and 

 of a pale color. In length the largest specimens measure 

 about 6 mm . 



Male. — Antennulae scarcely one-half as long as the body. The 

 third segment of the peduncle two-thirds as long as the second; 

 this, two-thirds the length of the first. Flagellum consisting of 

 about fourteen segments. The secondary flagellum very short, 

 and with but two segments. Antennae short, only half as long as 

 the antennulae. Last two segments of its peduncle elongated. 

 Flagellum consisting of but about five segments, and shorter than 

 the last two segments of the peduncle taken together. 



Second pair of thoracic legs stouter than tlie first. Propodite 

 of first pair quadrate, with nearly a right angle between the pal- 

 mar and posterior margins. Palmar surface on each side of the 

 cutting edge, with a row of about six notched and ciliated spines, 

 one or two of which at the posterior angle are larger than the 

 others. The cutting edge is entire. Dactylopodite as long as 

 the palmar margin, and furnished along the concave edge with a 

 few hairs. 



Propodite of the second pair of legs ovate in outline, twice as 

 long as broad. The palmar mar illy into the 



posterior margin. The cutting edge of the palmar surface un- 

 even, and having near the insertion of the dactyl a square projec- 

 tion. The palmar surface also armed with two rows of notched 

 and ciliated spines, five in the inner row, seven in the outer. 

 Dactyl short and stout. 



Two posterior pairs of thoracic legs longest of all and about 

 equal to each other. All the legs are stout and their basal seg- 

 ments squamiform. 



Postero-lateral angle of first abdominal segment rounded ; of 

 second and third, from obtuse-angled to right-angled. 



First pair of caudal stylets extending a little further back than 

 the second ; these exceeding slightly the third. The peduncle of 

 the first pair somewhat curve-!, with the concavity above, the rami 

 equal and two-thirds as long as the peduncle. The peduncle of 

 the second pair little longer than the outer ramus. Inner ramus 

 nearly twice as long as the outer. Third pair of caudal stylets 

 rudimentary, consisting of but a single segment. This somewhat 



