A NRW AND ANNECTANT TYPE OP OHILOPOD. 421 



stigmatic sclerite in front and a larger metastigmatic sclerice 

 behind, both beneath the edge of the tergiim; a sclerite 

 representing the stigmatic in position is also found below the 

 edge of the third, sixth, ninth, eleventh, fourteenth, and 

 seventeenth terga ; and a sclerite corresponding to the meta- 

 stigmatic is present below the first, second, fifth, eighth, 

 tenth, thirteenth, and sixteenth terga; but below the third, 

 sixth, ninth, eleventh, fourteenth, and seventeenth terga it 

 is less developed, being either small and narrow, or repre- 

 sented by a weakly chitinised integumental ridge. Towards 

 the posterior end of the body the praecoxal sclerite increases 

 in size, and encroaches upon the pleural membrane, until on 

 the last three somites the pleural area is covered with a 

 continuous chitinous plate, which is fused with the sternum, 

 and, in the case of the last somite, with the tergum also, as 

 already stated (PI. 23, figs. 3—7). 



The sterna ai'e subequal and laterally emarginate for the 

 articulation of the legs ; a pair of transversely elongated 

 praesternal sclerites extend in front of their anterior border, 

 as in the Scolopendromorpha ; on the last two somites these 

 sclerites fuse with the sterna (PI. 23, figs. 3, 4, 6). 



The stigmata, subcircular or suboval in shape, are six 

 in number on each side, and lie above the third, fifth, eighth, 

 tenth, twelfth, and fourteenth pairs of legs, as in the genus 

 Lithobius, and beneath the fourth, seventh, twelfth, 

 fifteenth, eighteenth, and twentieth terga. With the ex- 

 ception of those on the penultimate somite, which lie far 

 back, the stigmata are situated more forwards than in 

 other Chilopoda, being slightly in front of the articulation 

 of the legs, and of the middle of the lateral margin of the 

 terga (PI. 23, figs. 3, 4, 15). 



The legs are fifteen in number on each side, as in the 

 Lithobiomorpha ; with the exception of the last pair they 

 consist of what is doubtless the primitive number of segments 

 in the Chilopoda, namely six, the distal segment being 

 undivided, as in the Geophilomorpha and the less specialised 

 genera of Scolopendromorpha and Lithobiomorpha; the 



VOL. 45, PART 3. NEW SERIES. F F 



