176 Psyche [Sept.-Dee. 
tinued as a low granular ridge curving outward far behind the 
antennal socket and ending in a distinct angulation at the side 
of the head; front and clypeal area smooth and hispid; labrum 
broad, the front margin straight across. 
First segment with the rather short anterior margin project- 
ing horizontally at almost a right angle to the strongly convex 
disc, the margin divided into ten rounded scallops separated by 
acutely angular indentations, the outer scallop on each side 
Fig. 6. Ilyma cajuni. a, Segments 18, 19 and 20, lateral view; b, Gonopod. 
largest; disc with anterior row of four large tubercles and a 
posterior row of six similar ones, the surface elsewhere with 
scattered small granules; posterior margin with about 18 small 
tubercles projecting backward from it. 
Segment 2 with keels projecting at right angles to the long 
axis of the body, not produced forward; three lobes on the outer 
margin but only two lobes on the outer margin of the keels on 
all segments thereafter except the poriferous ones where the 
posterior lobe is replaced by the large, slenderly conic, truncated 
pore process. 
Segments with four major dorsal longitudinal series of tuber- 
cles, three tubercles in each row; the outer row of tubercles on 
each side less conspicuous than the inner row; small scattered 
granules present between the large rows of tubercles; keels with- 
out tubercles or granules. On segments 17 and 18 the outer rows 
of large tubercles are reduced in size and are almost lacking 
from segment 19; on segment 18 the two inner rows of tuber- 
cles are enlarged and also are slightly produced beyond the 
