326 



ME. C. J. WITH ON SOIJTH-AMEEICAN CHELIFEEIN"^ 



outline is much more strongly convex than in the female, and the posterior beyond the 

 basal elevation is very distinctly concave and then more strongly convex than in the 

 female (fig. o7 g). The clielco is only a trifle broader than the trochanter is long ; the 

 hand, which is only 1'2 as wide as the tibia, is 1'5 as long as the fingers, which are I'l 

 as long as hand is wide. The immovable finger has anteriorly only six " spots," less 

 regularly arranged. 



Colour. — The palps are dark reddish brown, the cephalothorax is brown, and the 

 abdominal sclerites are almost olive-coloured, and consequently there is no sharp 

 difference between a pale body and dark palps. 



Measurements. — Cephalothorax 0-690 (0-575) ; abdomen 2-07 (0-69) mm. 



Palps: trochanter 0-368 (0-253); femur 0-690 (0-299) ; tibia 0-690 (0-355) ; hand 

 0-690 (0-405), depth 0-415 ; finger 0-455 mm. 



Material. — Of this species I have examined two females collected by Mr. Jessen at 

 C?) Essequibo ; it has previously been recorded from Ecuador. 



Bemarks. — The male cf this species, which I was able to examine by the kindness of 

 Mr. Ellingsen, does not differ from the original description except in a single character ; 

 Ellingsen writes : " La main presque deux fois plus longue .... que le femur," while 

 the animal has the hand about as long as the femur; this mistake was caused 

 perhaps by a slip of the pen or by an error of the printer. That the female described 

 belongs to the same species as the male, is not quite certain. The 

 differences between them in the shape of the body as well as in the 

 structure of the trochanter and tibia, &c., are certainly striking, 

 but not so great that they cannot easily be explained as sexual ones ; 

 consequently I should not think myself justified in establishing 

 a new species. About similarity to Ch. navigator With, cf. 22. 

 p. 63. 



Variation. — In addition to the specimens mentioned I have 

 examined a much larger female, collected in a loaf on board the 

 Danish ship 'Galathea' in January 1847, which I feel obliged to 

 refer to the same species, as it only differed in mere trivialities. 

 The trochanter has protuberances somewhat longer (text-fig. 84) 

 and is deeper than the femur ; the tibia is less strongly convex 

 anteriorly and more distinctly concave posteriorly beyond the 

 basal elevation. The tarsus of the first pair of legs is only four 

 times as long as deep ; the femur of the fourth pair of legs is 

 2-5 as long as deep, 1-3 as long as the tibia, and 1-3 lower than the tarsus 

 is long. 



Measurements. — Body somewhat shorter and less slender ; the troclianter of the 

 palps 0-506 (0-322); femur 0-875 (0-405) : tibia 0-897 (0-437); hand 0-897(0-552), 

 depth 0-575 ; finger 0-585 mm. 



Text-fiff. 8i. 



Ch. elongatus Ell., 

 var., $ . Trochanter 

 of left palp in anterior 

 view. X 44. 



