East-Indian Chilopoda and Diplopoda. 69 
SPIROBOLOIDBEA. 
Trigoniulide. 
Trigoniulus philippinus, sp. n. 
Prozonites black dorsally, on the lower part of the sides 
passing into ferruginous, the covered zone throughout also 
of the lighter colour; metazonites above black in front, the 
caudal half ferruginous, the band of the latter colour widening 
down the sides. Anal scutum black, with a narrow ferru- 
ginous margin behind. Collum black, narrowly margined 
with ferruginous, the black area, like that of the other 
segments on the sides, embracing many dusky-ferruginous 
areas. Antenne and legs flavous, in part of a dilute 
ferruginous cast. 
Head smooth. Sulcus distinct across vertex, this part 
ending in a shallow depression between eyes, absent in 
frontal region but again distinct below. yes large, less 
than once and a half their diameter apart. Antenne short, 
thickened distally. 
Collum of usual form, excepting that the caudal margin 
just above the angle is more concave. Long, the anterior 
region protruding far forward. Margination as usual. 
Segments furrowed or shallowly constricted along the 
position of the segmental suture, but the latter not evident 
as a Sharply-defined sulcus. Below and up the sides to a 
short distance below the pores distinct, not crowded, longi- 
tudinal striz, but these strictly confined to the metazonites, 
the strie at tiie suture bending abruptly dorsad. The 
anterior prozonites covered densely with much finer wavy 
strize, which are oblique and short, these in approaching the 
level of the pore becoming more nearly vertical, and dorsally 
replaced by deeper transverse striz; in going caudad these 
fine striolations on the prozonites disappear, the dorsal ones 
first being replaced by short waved marks and. then quite 
disappearing. A series of small puncte and impressed 
horseshoe-shaped markings along the sutures above. In the 
middle and posterior regions tlie zonites above, especially 
across the metazonites, raised into a number of low broad 
longitudinal ruge. 
Anal scutum covering the valves above; a depression on 
the caudal border each side of the median angle, the de- 
pression crossed by two or three short furrows. Anal valves 
margined, the margining sulci deep; smooth. 
_ The anterior male gonopods of the usual general form, 
