,34 



arc fairly high, Ihose of Hic movable scjiiarely truncate, those of the otliei- finger 

 triangularly pointed. 



The armature of the luigers is in Chelifer cimicokles F. and related s])ecies 

 interesting on account of the presence of an anterior and posterior row of conical, 

 not marginal teeth; this structural feature was noticed and described by Hansen 

 years ago (1884. 9. p. 528), and again set forth by him later on (1894. 46. p. 234, 

 lab. V, fig. 14), but was nevertheless represented as new by Stchelkanovzcfl', who 

 deals with their systematic importance in a little paper (1902. 64. pp. 353-354). 

 The latter describes them minutely in three species; I can confirm his observation 

 as far as Ch. nodosiis. Schranck is concerned, namely that the movable finger 

 bears a single tooth inwards and three outwards, while the immovable has two 

 teeth inwards and four outwards. The number of these teeth seem to be variable 

 in Ch. Hawaiiensis Sim. (21. pi. VI, fig. 3 a, pp. 105 and 107). 



5. Legs. 



Introductory Remarks. 



The legs of the Chelonethi consist of a coxa, a trochanter and a femur, which 

 is only undivided in a single genus, Chiridiiim Menge, but as a rule divided in two 

 more or less developed joints in all other genera, in addition to a tibia and one 

 or two tarsal joints; there is always a marked difference between the two first 

 and the two last pair of legs. When in the following the third and the fourth 

 joint of a Chthonius C. K. f. inst. are named the basal and tibial femoral part, it 

 is, because these two joints are homologuons to one joint in Chelifer Geof., which 

 is a real femur in functions; but it is to be remembered, that no premature inter- 

 pretation of the real nature of these joints is involved, in using this term. 



The coxa and the trochanter have been named in a similar manner by all 

 authors, and so have the joints of the last two pair of legs. But the distal joints 

 of the two first pair of legs have been interpreted in various ways by different 

 authors. As it is upon the explanation of the nature of the femoral parts, that the 

 interpretation of the more distal joints depends, I will briefly set forth the main 

 points of the two principal theories, together with new facts in favour of the one, 

 under the discussion of the variations, which occur in the femora of the two first 

 pair of legs. The modifications of the femora of the fourth pair of legs as well 

 as those of the other joints of the first as well as of the fourth pair, will be 

 discussed in due time. Tliis chapter will be closed with remarks on the variations 

 in tlie structure of the arolium, claws and hairs of the legs. 



I. Coxae. 



The shape as well as the position of the coxae sometimes provide features of 

 interest. In the Panctenoducti/li they arc placed more or less on a level with the 



