PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 527 
4. Ps. vupir Cope, loc. cit., p. 180; Packard, Am. Nat., v, pp. 748, 749, 
1871; Harger, loc. cit., pp. 118, 119. ) 
Habitat.—? Montgomery County, Virginia. 
Length 11 lines. 
5. SPIROSTREPHON (PSEUDOTREMIA) COPEI Packard, Am. Nat., v, pp. 
748, 749, 1871.—Scoterpes copei Cope, Am. Nat., vi, p. 409, genus Sco- 
terpes proposed and defined p. 414; Harger, loc. cit., pp. 118, 119; 
Packard, Zoology, pp. 356, 357. 
Habitat—Mammoth Cave, Kentucky. 
Length .35 inch. 
TRICHOPETALUM Harger, Am. Jour. Sci., iv, p. 118, pl. ii, 1872 
6. T. LUNATUM Harger, loc. cit., p. 119; Ryder, Am. Nat., xiv, p. 376, 
1880. 
Habitat.— New Haven, Conn., and Philadelphia, Pa. 
Length 6"". 
7. T. GLOMERATUM Harger, loc. cit., p. 120. 
Habitat.—John Day River, Oregon. 
Length 10"". 
8. T. JULOIDES Harger, loc. cit., p. 120. 
Habitat—Simmons’ Harbor, north shore Lake Superior. (Smith.) 
Length 8™". 
The ninth American species, described below, is the third form of 
Lysiopetalid which is known to inhabit caves, and the only one beside 
the species which stands fifth in the above list which is totally blind. I 
name the species for Dr. C. A. White, United States paleontologist. It 
is a hairy form, like the four preceding, and will, no doubt, with those 
- constitute a Ste homogeneous group. 
ZYGONOPUS,* nov. gen. 
Char. gen.—Sixth pair of legs very robust and with the third joint 
greatly swollen (a unique feature amongst Myriapods, 
and one which, like the claspers and intromittent 
organ of Branchipods, is to be regarded as a second- 
ary sexual character, and of value in the character- 
ization of a genus). 
9. ZYGONOPUS WHITEI, 0. Sp. 
Char. specif—Head with short, dense hairs. No 
eyes, but there is a well-marked depression, or rather 
vertical excavation, extending from the end of the la- 
brum to behind and above the insertion of the antenne, 
Behind the antennz the head is much swollen, owing | Fig. 1. Front view of 
head and antennz. 
to the outwardly bulging basal pieces of the jaws; Fig. 2. Swollen 6th leg 
or clasper. 
labrum emarginate inferiorly; epicranium emargin- Pig. 3. Normal leg. 
ate behind to receive the anterier semicircular margin of the first 
* From wyoe, a yoke, pair; yové, that which generates; and movc, foot (leg). 
