102 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 118 
Ficure 5.—a, Xenoporus carinaceps, left gonopod, mesal view. b-e, Enantiogonus fragi- 
lis: b, Segments 17, 18, and 19, dorsal view; c, preanal scale; d, leg from middle of body; 
e, right gonopod, oblique lateral view from slightly behind. f-g, Hypstloporus proclivis: 
f, Antenna; g, first 5 segments, with setae omitted, lateral view. 
as in generic description except that the rows of primary tubercles 
do not increase in height on posterior segments but are closer together; 
keels all three lobed to segment 18 with outer margin thickened; 
pore opening from the upper side of a large tubercle projecting 
from dorsal side of the third lobe of the keel (fig. 4f), keels of segment 
17 scarcely produced cadually, those of segments 18 and 19 strongly 
so with the latter showing no lobes on the outer margin in strong 
contrast to those preceding (fig. 4g). Last segment long, much 
exceeding segment 19; sides nearly parallel; apex occupied by three 
large lobes, which are strongly concave below, the quadrisetose 
ventral tubercle well in advance of apex of middle lobe; dorsal surface 
with broad median ridge extending to end of median lobe. 
Gonopods as in figure 5a. 
Male with second joint of third legs thicker and longer than in 
other legs, an acute tooth near outer end on ventral side. 
The foregoing generic and specific descriptions were based on 
the male only as the female shows a number of differences and may 
