64 REPORT ON THE CENTIPEDES AND MILLIPEDES OBTAINED BY 



In possessing 51 pairs of legs this species resembles L. gigas of Haase (Abh. Mus. 

 Dresden, No. 5, p. 105, PI. VL fig. Ill) recorded from New Guinea, but apart from its 

 much smaller size, gigas attaining a length of 105 mm., L. lifuensis certainly differs 

 in having the anal pleurae but little inflated and the pores large, few in number and 

 not close-set. Haase describes these organs in gigas as follows: — "pleurae posticae 

 valde efflatae, rotundatae, poris perminutis plurimis perforatae." Mr Cook, it may be 

 added, has recently established the genus Megethmus for M. microporus of Haase (Proc. 

 U. S. Nat. Mus. xviil, p. 74, 1896). 



Family. Gonibregmatidae, Cook. 

 Proc. U. S. Nat. Mus. xviil, p. 16, 1895. 



Genus. Gonibregmatus, Newport. 



Newport, Proc. Zool. Soc, 1842, p. 181 ; Linn. Trans, xix., p. 434, 1845. 

 Pocock, Max Weber's Zool. Ergebnisse, etc., Vol. ill. pt. 2, pp. 317-319, 1894. 



Sub-frontal plate of head hairy ; produced downwards into a triangularly pointed 

 prominence which supports the labrum at its apex ; labrum consisting of a small 

 semicircular plate of which the whole of the free margin is pectinate; that is to say, 

 armed with fine, close-set spinules. (Figs. 1 c — 1 d.) Laminae fulcientes irregularly 

 hammer-shaped, with a slender posterior process which nearly meets its fellow of the 

 opposite side in the middle line. Closely pressed against the laminae fulcientes and 

 lying in the hollow formed by the labral process in front lie the mandibles. Each of 

 these is composed of two branches, an outer and an inner ; the former are in front of 

 the latter, broad at the base, pointed at the apex, with the outer margin bristly, the 

 inner or biting margin pectinate; the inner and posterior branches of the mandibles meet 

 in the middle line throughout their length, though apparently without actual fusion, 

 forming together a broadly triangular plate, the distal portion of which is membranous. 

 (Figs, le-lg.) 



Maxillae forming a plate, the free part of which is composed of a pair of rounded 

 unsegmented plate-like, hairy lobes. (Fig. 1 h.) 



Maxillipedes of 1st pair robust, coxa produced posteriorly, the rest of the segments 

 thickly hairy or bristly, the claw strong. 



Maxillipedes of 2nd pair with coxal plate twice as wide as long, the rest of the 

 appendage slightly overlapping the head at the sides, with long, powerful claws. (Fig. 1 c.) 



Head-plate about as long as wide, with very distinct and large frontal plate. 



Antennae broad at the base, distally parallel-sided, segments more or less moni- 

 liform. Prebasal plate small, transversely lanceolate ; basal plate wider than head. 



Tergal plates with a pair of impressions, one at each side, rugose mesially. 



Sternal plates with the pores apparently arranged in irregular transverse areas. 



As many as five pleural sclerites above the stigmatiferous sclerite ; stigmata 

 vertically linear. 



