124 Mr. R. I. Pocock on the 



small inferior anterior spinule ; the apophysis stout, about as 

 long as the anterior thickness of the tibia, armed with two or 

 three teeth internally in front of the apex, and three more 

 posteriorly, the posterior of which is on the inner edge of the 

 tibia, its external edge coarsely serrate. Tarsus narrower than 

 tibia, smooth, polished, sparsely punctured, with an anterior 

 inferior spine, the movable digit normally sulcate and punc- 

 tured, its inner border sinuate. 



Legs. — Tarsus of first pair with the second segment distally 

 incrassate, considerably longer than the third or fourth ; the 

 fifth and sixth segments short, the latter with its inner surface 

 internally produced, thickened; the seventh longer than the 

 fifth and sixth taken together, thickened externally and 

 presenting the appearance of having been twisted on its own 

 axis, coarsely punctured; the eighth about as long as the 

 seventh, its upper surface depressed ; the ninth as long as the 

 eighth, unmodified. 



The rest of the legs with femora finely granular externally. 



Measurements in millimetres. — Total length 52, length of 

 carapace 18'5, distance between lateral eyes and posterior 

 border 13. Chela : length of femur (below) 8*5, of tibia (above) 

 6*3, of its apophysis 4+, of tarsus 5, of movable digit 5*2; 

 width of femur 4"5, of tibia 5, of tarsus 4. First leg, length 

 of third segment (femur) 12*5, of fourth 17*5, of fifth lti'5, 

 of tarsus 8 - 5 ; fourth leg, length of femur 14, of patella Iro, 

 of tibia 15, of tarsus (three segments) 5*5. 



A second specimen, an immature male, resembles the 

 female described above, except that it is smaller, being 

 44 millim. long, and has the tarsi of the first pair of legs un- 

 modified, the ninth segment being relatively longer than the 

 eighth, and the eighth than the seventh. Moreover the 

 posterior tooth on the lower surface of the trochanter of the 

 chela is simple. 



Loc. Mount Dulit, in Sarawak (N. Borneo). Collected 

 by C. Hose, Esq. 



This appears to be the largest described representative of 

 the genus, using the term as restricted above, the average 

 length of which appears to be less than 35 millim. The 

 two that approach it nearest are Th. manillanus of C. Koch 

 and Th. dorice of Thorell, both of which may exceed 

 40 millim. 



The latter, which was obtained in Sarawak (the neigh- 

 bourhood of the town) , differs from Hosei in having only one 

 anterior spine on the trochanter of the chela, and this segment 

 and the femur smoother, and the ocular tubercle much lower 

 in front. 



