248 ME. C. J. WITH ON SOUTH-AMEEICAN CHELIFEEIN^ 



front of the row laterally, the posterior of these two hairs corresponding to the exterior 

 in the hindmost transverse row of the preceding segments, which has changed its 

 position in correlation with the different shape of the sclerites. Of course the position 

 of the above-mentioned hairs is not always the same on the right and on the left side, 

 and it is not always easy to tell to which category a hair is to be referred. The 

 eleventh tergite bears probably a pair of " tactile " hairs. 



Antennae. — The very long and slender^cylindrical galea, which has about six short 

 terminal branches, is almost twice as long as the terminal hair. 



Palps (PI. XXIX. figs. 9 a-c). — The maxillce are almost smooth in the middle, but 

 granular laterally and in front ; the palps are distinctly granular, especially above, with 

 the exception of the fingers, which are smooth, and the hand, which is indistinctly 

 granular above and almost smooth beneath. The hairs are short ; those of the 

 trochanter and femur are slightly clavate, while most of those on the tibia and hand 

 are obtuse. The trochanter, which has a rather short and well-defined stalk, is about 

 1'5 as long as wide ; the anterior outline is moderately convex, while the posterior 

 surface is ventrally slightly produced just beyond the stalk but dorsally produced into 

 a rather deep, rounded, conical protuberance. The femur, which has a short fairly well- 

 defined stalk beyond the middle, where it is widest, is somewhat attenuated towards 

 the end, and is 2*6 as long as wide; anteriorly beyond the stalk it is almost straight, 

 while posteriorly beyond the stalk it is first rather abruptly convex and then very 

 slightly so. The tibia, which is of almost equal length to, and somewhat wider than, 

 the femur, has a short and fairly well-defined stalk and is 2'2 as long as wide ; the 

 anterior outline beyond the stalk is moderately convex, while the posterior beyond the 

 slightly marked condylus and almost obsolete basal elevation is first straight and then 

 terminally slightly convex. The chela is almost three times as long as wide ; the hand, 

 which is a little broader than the trochanter is long, is IT shorter but I'o wider than 

 the tibia ; it is 1*6 as long as wide, somewhat wider than deep, and I'S as long as the 

 fingers ; the lateral outlines of the hand are only moderately convex. The fingers 

 possess " spots " anteriorly as Avell as posteriorly, the number and arrangement of which 

 have been figured (figs. 9 h-c). 



Coxm. — The fourth pair, which are somewhat widened out towards the end, have 

 the interior margin, which is half as long as the posterior, fairly well defined from the 

 latter, which is almost straight. 



Legs. — The proximal joints are very indistinctly granular; dorsally the hairs are 

 short and slightly clavate or obtuse, while ventrally they are pointed and more or less 

 simple ; the trochanters and trochantins have the usual " tactile " hairs on the ventral 

 surface. A tarsal " tactile " hair seems to be present, f removed from the base. The 

 trochantin of the first pair of legs is only a little deeper than the femur proper and the 

 articulation is of the usual structure [cf. above) ; the tibia is only a trifle shorter than 

 the tarsus, which is 4'5 as long as deep. The femur of the fourth pair of legs, which 



