CRUSTACEA FROM THE FALKLAND ISLANDS. 377 
Puate III. 
Tryphosites chevreuxi Stebbing. 
n.s. Line indicating natural size of male specimen figured below. 
a.s., a.%. First antenna and part of the second. 
gv.1, gn.2. First gnathopod with distal portion more highly magnified, and second 
gnathopod. 
prp. 2, 3,5. Second and third pereopods, the latter without the branchial vesicle ; 
fifth pereopod, with second joint only partially figured for economy of 
space. 
urp.2, urp.3, T. Second and third uropods; telson in dorsal view, with higher 
maguitication of the apex of the lelt division. 
The separate parts are enlarged to a uniform scale, with additional enlargements 
of the first gnathopod and the telson. 
Prats IV. 
Pariphimedia normani (Cunningham). 
n.s. Line indicating natural size of female specimen figured below. 
C. Partial side view of head. 
l.s., l.s’. Upper and lower lips. 
m., me. 1, mx.2. Mandible, first and second maxille. 
gu.1, gn.2. First and second gnathopods. 
All the separate parts, except the head, are magnified to a unitorm scale. The 
marsupial plate of the second guathopod is omitted. 
Puate V. 
Pariphimedia normani (Cunningham). 
mep. Maxillipeds. 
prp.2, 3,5. Second and third pereeopods incomplete, and fifth pereeopod. 
urp.1. First uropod, the peduncle incomplete. 
urp. 2, urp. 3, T. Dorsal view of second and third uropods, with the telson. 
For economy of space the perzeopods are given on a lower scale of magnification. 
The other parts are uniform with those of the preceding Plate. 
PuateE VI. 
Monoculopsis vallentini Stebbing. 
n.s. Line indicating natural size of the specimen figured below. The figure is partly 
schematic, as prior to dissection details of the crowded overlapping limbs 
could neither be clearly seen nor satistactorily represented. 
a.d., a.i. First and second antenne. 
1.s., mx.1, maz. 2. Upper lip, first and second maxille. 
gn. 1, gn.2. First and second gnathopods. 
Puate VII. 
Monoculopsis vallentini Stebbing. 
m., 1.i. Mandible and lower lip. : 
prp. 2, 3,4,5. Second, third, fourth, and fifth perseopods. The branchial vesicle and 
marsupial plate of the second perzeopod are omitted. 
plp. A pleopod. ; : 
urp. 1,2, 8,3. The right first uropod, the left second uropod, the pair of third uropods, 
with the peduncle only of the left first and the right second. The telson 
appears as if it were attached to the fifth segment of the pleon, but is really 
attached high up on the sixth which it overlaps. 
In this and the preceding Plate the mouth-organs are more highly magnified than 
the other parts, but each set is on a uniform scale. 
