Alyrioj->oda of the ^Challenger'' Expedition. 133 



Head smooth, witliout frontal setee. Eyes obscurely mani- 

 fested, represented by a patch of black pigment. Antennm 

 short, scarcely surpassing the collum. 



ColJum laterally angular and marked with a few strife. 

 The first five segments smooth above, striate at the sides ; 

 the rest striate above and at the sides, the striffi not close-set 

 and not reaching the hinder border of tlie segments. The 

 sulcus complete and deep, crenulate, the area in front of it 

 smooth. The pores conspicuous, situated just behind the 

 sulcus, and, except at the hinder end of the body, touching it, 

 the sulcus being posteriorly angled to meet the pore. 



Anal tergite covering the summit of the valves, sometimes 

 just surpassing them ; valves convex, not compressed, and 

 scarcely hairy ; sternite triangular. 



Legs short. 



^. Smaller and thinner than female. The first pair of 

 legs small and hook-like ; the second pair without coxal pro- 

 cesses ; the second segment of tlie mandible produced, back- 

 wards into a large rounded prominence. 



Number of segments up to 44. 



Length up to 15 millim. 



Loc. Inaccessible Island and Tristan Island (Tristan 

 d'Acunha). 



Julus solifarius, sp. n. 

 (PI. IX. fig. 4.) 



Colour very like that of 7. pusillus of Leach ; two longitu- 

 dinal flavous dorsal bands, the median dorsal line and the 

 sides of the body black, the lower surface and legs flavous ; 

 antennge and space between the eyes fuscous. 



Head lightly punctulate, without distinct frontal pores. 

 Eyes well developed, subcircular, composed of at least five 

 distinct rows of well-defined ocelli. Antennce a little longer 

 than in the preceding species. 



The collum laterally acutely triangular, margined, its ante- 

 rior border lightly sinuate ; the first three or four segments 

 smooth above, striate at the sides, the rest striate above and 

 below, the strise deep but not close-set and not reaching the 

 hinder border of the segments. . The sulcus deep, the area 

 behind it raised, that in front of it smooth. Pores scarcely at 

 all conspicuous, situated just behind the sulcus but touching 

 it, the sulcus lightly anteriorly angled. 



Anal tergite surpassing the valves a little, the process short 

 and down-curled ; valves convex, not compressed, and smooth ; 

 sjternite acutely triangular and very long. 



