CHELIFEEID^E AND GARYPID^ IN THE BRITISH MUSEUM. 75 



Leg I. : fenmr i. 0-190 (0'103) ; femur ii. 0-152 (0-099) ; tibia 0-182 

 (0-072) ; tarsus i. 0-106 (0-050) ; tarsus ii. 0*091 (0-038) mm. 



Leg IV. : femur 0-4:56 (0*232), trochantin 0-190 ; tibia 0-350 (0-118) ; 

 tarsus I. 0-152 (0-072) ; tarsus ii. 0-122 (0*061) mm. 



Abdomen, etc. — The genital area is not prominent, but nevertheless easy to 

 distinguish from that of the female. The galea, which scarcely extends 

 beyond the terminal hair, is much more slender, with branches much shorter 

 (PL 9. fig. 33). 



Palps. — The chela is 2-7 as long as wide and only 1*4 as wide as tibia ; the 

 hand is scarcely wider than deep and 1*1 as long as the fingers. 



Measurements. — Cephalothorax 0*460 (0*437) ; abdomen 1*20 (0*58) mm. 



Palps: trochanter 0*253 (0*184) ; femur 0-425 (0*184) ; tibia 0*437 (0*220) ; 

 hand 0-450 (0-315), depth 0-315 ; finger 0-405 mm. 



Leg I. : femur i. 0-182 (0-091) ; femur ii. 0-152 (0-094) ; tibia 0-175 

 (0-068) ; tarsus i. 0-106 (0*046) ; tarsus ii. 0-091 (0-038) mm. 



Leg IV. : femur 0-437 (0*224), trochantin 0-160 ; tibia 0*342 (0*110) ; 

 tarsus I. 0*152 (1-061) ; tarsus ii. 0*122 (0*053) mm. 



Material. — Of this species I have examined three males, two females and a 

 young one, collected by M. E. Simon at St. Vincent. 



Remarhs. — One of the main differences between the described form and 

 Olp. hrevifeinoratmn, Balzan (5. p. 440 and 6. p. 549) is that found in the 

 chela of the palps, which is 2*7 (cJ) instead of 2-9 as long as wide, and 1*4 

 instead of 1*3 as wide as the tibia, with the hand 1*3 ( ? or $) as long as the 

 finger instead of 1*6. The differences between the legs are even more striking, 

 the second tarsal joint being much shorter instead of much longer than the 

 first for instance, and I consequently think that the establishment of a new 

 species is necessary. 



7. Olpium pacificum, sp. n. (Plate 9. figs. 34-38, Plate 10. fig. 39 ; cf. With, 

 18. fig. 12, p. 89.) 



Cephalothorax. — The anterior pair of eyes are placed on the lateral margin 

 and at a distance about equal to their diameter from the front margin. The 

 cephalothorax, which is somewhat longer than it is broad in the middle, where 

 it is broadest, narrows in front of the eyes, thus producing a short cucullus, 

 which has an indistinct notch in the middle of the front margin. The 

 cephalothorax shows in the middle trace of a transverse suture distinctly 

 curved backwards (cf. 18. fig. 12, p. 89, in which figure, however, it is too 

 prominent). The integument is smooth and polished, and the hairs are 

 moderately long and pointed. 



Abdomen. — The long and slender abdomen has the undivided scleritfs 



