360 Mr. R. I. Pocock on Chilopoda and Diplopoda 



[Fontaria Holstn, sp. n. (PI. XI. figs. 9, 9 a.) 



? , — Colour olive-green, the middle of the dorsum slightly 

 paler, the borders of the keels and of the labrura, the distal 

 ends of the antennal segments, and the tarsi flavous. 



Bodi/ smooth and polished, very slightly wrinkled just above 

 the keels; dorsum evenly arched from its summit to the edge 

 of the keel ; keels small, rising above the middle of the side, 

 directed slightly upwards and backwards, the posterior angle 

 spiniform ; the posterior border of the keels directed slightly 

 forwards in segments 1 to 6, and slightly backwards in 

 segments 14 to 19, the margin moderately thickened. Caudal 

 jjrocess triangular, apically truncate, and laterally bituber- 

 culate. 



Anal stermte semicircular, bituberculate. 



Legs with the spine slender, elongate, and acute. 



(J . — Less robust, but with larger keels. 



Cojiulatory feet rather small, each dividing distally into an 

 anterior or upper and posterior or lower ramus ; the latter 

 pointed, strongly curved internally and furnished along its 

 inner edge with a series of long thickly-set hairs, the former 

 flattened antero-posteriorly and strongly curved when viewed 

 from the side, shorter than the other. 



Length of female 47 millim. ; width across keels 9*5, across 

 cylindrical part of segment 7. 



Length of male 47 millim. ; width across keels 9, across 

 cylindrical part of segment 6. 



Loc. Great Loo-Choo [Hoist Coll.).] 



[Fontaria neptunus^ sp. n. (PI. XL fig. 10.) 



(^ . — Colour pale yellow ; lower surface, antennse, and legs a 

 uniform pale colour ; an olivaceous spot on the front of the 

 head and two connected by a transverse band on each segment, 

 the cylindrical part of each segment clouded above with yellow, 

 a central spot being darker. 



Copulatory feet resembling in construction those of the 

 preceding species ; the two rami, however, closer together, 

 and each of them is tridentate at the apex. 



Length 40 millim. ; width across keels 7*5, between 

 keels 5*5. 



Loc. Great Loo-Choo [Hoist Coll.). Several male 

 specimens. 



This species differs from the preceding in being slightly 

 smaller, differently coloured, and in having the copulatory 

 foot differently formed.] 



