38 



Fig. 7. Gaifjpinnx nohilis n. sp. 



X 95. Left femur I ; « in anteriüi- 



view, b in posterior. 



ir WC examine llie lirsl jjair of femurs ol' a Guriipiiius Dad., a genus unknown 

 lo Hansen, f. insl. G. nobilis n. sp. (fig. 7 a-b), we will find ils structure very 

 similar lo lluil of Chelifer suhruber Sim. The basal portion of the femur is about 

 one third of Ihe tibial, and distally, where it is widened out, scarcely dee|)er. 



Anteriorly there is a very narrow articulate mem- 

 brane and a median liny tooth represents the con- 

 dylus; posteriorly we lind no condylus and the 

 margin of the trochanter overlaps that of the tibial 

 part; the limitation between the joints is per- 

 pendicular on the longitudinal axis. The two joints 

 form together a femur similar to that of Chelifer 

 Geof. w'ith a basal trochantin. The main movement 

 seems to be a very limited wriggle in the horizontal 

 plan especially forwards (fig. 7 a-b). A muscle cor- 

 responding to Borners „flexor femoralis" is found. 

 By examining the first pair of legs of a Garypiis 

 irnigatiis Sim. f. inst. (figs. 8 a-b), we will lind the 

 basal femoral part much longer than the tibial and 

 widened out towards the end, where it is deeper 

 tlian the tibial part; the two joints are connected by a hinge-joint with the princi])al 

 mobility in the vertical plan. The condyli are teeth, of which those of the basal 

 part are best developed and especially the anterior. 



In spite of differences in articulation, shape and 

 comparative length between the femurs of the two 

 first pair of legs in Garypinus Dad. and Garypiis L. K., 

 the homology between their divisions is easily proved 

 The dilTerence in length between the two joints is 

 scarcely of much importance, because we find all 

 intermediary forms between the short basal portion 

 of Garypiiuis Dad. and the long of Garypus L. K.; in 

 Garypiims sp. from Hawaii for instance we have Ihe 

 basal portion more than half as long as the tibial, 

 and in Garypiims sp. from Funafuti as well as in 

 G. dimidiatus L. K. the two joints are of equal length. 

 The differences in shape of the basal part are de- 

 pendent on the ditlerences in length and intermediary 

 forms are found between the extremities; as far as 

 the variations in the articulation between the two joints are concerned, I have 

 not had the opportunity of examining other species than the two already mentioned, 

 but without doubt intermediary forms occur between the extremities, exhibited 

 by these. A further confirmation of the homology between the two joints is 

 found in the position of a characteristic "lyriform" fissure; we lind namely 



a /. 



Fig. 8. Ganjpus irniijalus Sim. 



X OS. I,eft femur I ; a in anterior, 



b in posterior view. 



