East-Indian Chilopoda and Diplopoda. 57 
length as the sixth, these two much longer than the inter- 
mediate ones. In the male the antenne are also attennated 
from the base distad, but the fast article is somewhat 
thickened and moderately clavate, proportionately stouter 
than in the female. Head smooth and shining, the puncte 
few and widely scattered above, more numerous in clypeal 
region. 
Collum with anterior margin strongly arcuate, each half 
strongly concave, and the two curving forward and meeting 
at an angle at the middle. The caudal margin between thie 
lateral angles semicircular. Surface smooth, not punctate. 
Second tergite strongly margined in front laterally, the 
elevated border narrow in middle above and widening down 
each side as usual, then again narrower laterally. Plates 
depressed strongly within the border below and at the sides 
in front, but not dorsally. Surface not punctate, shining. 
Other tergite also smooth and shining, not punctate. 
Anal plate smooth and shining, under magnification 
showing very fine punctations. Above lower or caudal 
margin a weak depression or obscure furrow. 
In the vulva the suture between the halves of proximal 
division runs obliquely from the caudal end ectocephalad, the 
outer piece lying almost transversely. Distal margin of 
these pieces taken together a little concave, very oblique, the 
mesal piece extending distad much beyond the outer and 
beyond the distal piece as well. The latter is low, but 
broadly extended over the ectocephalic surfaces of the two 
basal pieces. 
In the posterior gonopods of the male the two fingers are 
concave on their adaxial sides, convex on the abaxial, curving 
together and crossing at the tips; each finger serrate or 
dentate along the adaxial edge for the entire length. 
Length (male) about 22 mm. ; width 9:2 mm. 
Locality South India: Periakulum (Mrs. D.C. Scudder, 
May 1863). 
Type, Mus. Comp. Zool. (No. 4694); paratype 
(No. 4695). 
HELIGMASOMA, gen. nov. 
Resembling Cyliosoma, a genus apparently confined to 
Australia and adjacent islands. From that genus differing 
in having the apical as well as the proximal division of the 
vulva of the female longitudinally divided into two pieces, 
So far as the published descriptions and the species I have 
examined give evidence, the antennze of Cyliosoma are each 
