392 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
2.5 times longer than wide, with three terminal bristles in a character- 
istic position; middle bristle always curves outward. Situated be- 
hind the limb base are two symmetrical lunate disks, which can be 
seen very well after treatment with KOH and crushing. 
Length, 300-340 microns. 
Male: Basic form like that of female but with great sexual modi- 
fication on A.1, P.2-4, and the furea. A.1 a very strong grasping 
organ, third and fourth articles fused, 2-3 times stronger than in 
female. P.2, Enp. broadened in middle, first and second articles 
of base separated, functioning like a joint. P.3 very modified, with 
simple Enp. easily lost. Exp. of very characteristic form; terminal 
article with two sabre-shaped bristles. The outer one sometimes 
is lost and cannot be observed. First article Exp. without bristles 
but with large adhering chitinized plates. Connecting piece (between 
the limbs) very strong. P.4 with grasping surface on inside of basal 
article of Exp., forming pincers. Enp. clamplike, very different from 
that of female. Furcal branches unmodified, with five bristles, 
terminal one enlarged near the base. 
Length: 340-370 microns. 
Types (deposited in the U.S. National Museum): Holotype male, 
USNM 104409; allotype female, USNM 104410; and two paratypes. 
Parastenocearis hurdi, new species 
FIGURE 2 
Female: Body wider in middle than at the ends, genital segment 
the widest. Cephalothorax 6 times longer than second thoracic seg- 
ment. Last abdominal segment remarkably lengthened, almost as 
long as genital segment. Furca of the same length, about 3 times 
longer than broad, with six bristles. Operculum rudimentary, un- 
ornamented. Body about 6.5 times longer than width of genital 
segment. Rostrum lacking. Mouth parts quite reduced, but in 
general similar to those of P. brasilibathynellae. 
A.1 6-jointed; first article forms a strong trunk; second article with 
three very characteristic bristles on inner margin. 
A.2 with a strong allobase, Enp. small. Exp. or an equivalent 
bristle apparently absent, but a large sensory seta is present on the 
base. P.1 Exp. 3-jointed, the middle article without a bristle. 
Terminal article with three bristles of differing length. Emp. 2- 
jointed, second article with two terminal bristles, first article without 
a bristle; the two articles subequal. P.2-P.4 with 1-jointed Enps. 
Enp. P.2 with two terminal bristles, those of P.3 and P.4 with one 
terminal bristle. Enp. P.2 easily broken. P.5 about 2 times longer 
than wide, with four bristles. 
Length, 220 microns. 
