104 



DR, W, G. RIDEWOOD ON THE 



[Feb. 15. 



It not infrequently happens that the full complement of digits 

 is not developed in the regenerated limb. Barfurth (2) has 

 figured cases in which onh' one, two, three or four digits are 

 present ; and of the five ' specimens now under consideration two 

 possess ordy one and three digits respectively. 



Figs. 6-9. 



Outlines of developing hind limbs (normal) of AJytes obstefrieans ( X 10). 



Specimen A. The regeneration in this case was most successful. 

 The left leg resembled the right so exactly that, although the foot 

 was slightly smaller aud the toes a little shorter in proportion, the 

 difference would pass without notice unless attention were specially 

 directed to it. The colour-markings of the integuuient were 

 identical in the two legs, and also the extent of the webbing of the 

 foot. The skeleton of the leg (fig. 1, p. 103) is seen to be remark- 

 ably complete and in perfect keeping v^ith the external characters 

 of the limb. The only important feature in which this regenerated 

 limb-skeleton differs from the normal is the presence of but one 

 phalanx to tlie hallux and the sleuderness of the hallux metatarsal. 

 The remaining digits, the calcar, and the whole of the tarsus 

 present no diSerences. The distal end of the tibio-fibula is in 

 perfect continuity with the proximal portion, and there are no 

 markings to indicate the limits of the secondary aud jirimary 

 portions of this bone. 



Specimen B. In this specimen the regenerated left leg was 

 considerably shorter than the right or normal. The femoral joint 

 was of the same size as in the right, but the remaining parts of 



^ That is, the five specimens which completed their metamorphosis. The 

 development of the sixth appears to have been coiupktelv arrested, aud the 

 regenerated limb at the time of death had the form of a mere non-digitate bud, 

 too small to allow of a macrosco|)ic examination of the skeleton. This sixth 

 specimen will, therefore, not be referred to again. 



