333 



The dorsal surface evenly vaulted from side to side; the ventral 

 surface flat. 



The pleurae free as in the Qlomeridae. Legs six-jointed , basal 

 segments large. The pedal laminae invisible. The first tergite smaller 

 than the second but resembling it in shape; the second tergite like 

 the rest in form. The anal tergite vaulted from side to side, incom- 

 plete below, and forming a complete hood, which covers the posterior 

 legs as in the Glomeridae. The head strongly convex from above 

 downwards: no eyes, but a large circular depression above the base 

 of the antennae; antennae close together, situated on the front of the 

 face; their articular socket closed behind. Mouth mandibulate. 



30. Glomeridesmus sumatranus, sp. n. 



Sumatra: Mount Singalang. One example. 



Colour. Head fuscous above, pale below, dorsal surface a uni- 

 form brown tint; lower surface, legs and antennae pale. 



Head not sulcate above , smooth , hairy below ; antennae hairy along 

 the under surface. 



Somites overlapping, smooth, furnished above in front with a few 

 fine transverse striae which below laterally curve round and take up 

 a longitudinal direction. Towards the posterior end of the body the 

 postero-inferior angle is produced directly backwards into a tooth 

 like prominence, which increases in size towards the hinder end, 

 that on the anal tergite being the largest. 



In the legs the femur is the largest segment, the tarsus is very 

 slender and is armed with a distinct claw. 



Length about 6 mm.; width about 1.3. 



Order helminthomorph a , Pocock. 

 Ann. Mag. Nat. Hist. (5), Vol. XX pp. 283—295 (1887). 



Elongate slender Diplopoda, capable of being spirally coiled (exc. 

 Sphaeriodesmus). 



Body composed of from 19 to over 90 segments, the 1 st or 2 nd 

 segment sometimes larger than those that succeed them but the anal 

 segment is nearly always smaller than those in front of it and only 

 very rarely a little larger. The anal tergite forming a complete ring, 

 which surrounds a pair of anal valves (? pleurae) and an unpaired 

 sternite (? pedal lamina). The pleurae of the body-segments very ra- 



22 



