— 114 — 



wliicli this boue bifurcates behind are separated by a large 

 vacuity from the paroccipital. In Phelsuma (which genus 

 is so well represented in these islands and on the coasts 

 of this geographical region, and which might have been 

 expected to occm- in Eodriguez) the parietal has quite a 

 different shape (P. sei/chelleme), and its posterior pro- 

 cesses are adpressed to the paroccipital. 



The articularhj piece of the mandible differs nowise 

 from that of G. venis ; like the latter it is produced behind 

 the condyle into a hamate grooved process, which, however, 

 is much more concave on its upper sm'face in the Eodri- 

 guez species than in G. vcrus. 



The humerus offers a more striking difference from 

 G. vents than the preceeding bones ; it is much stronger, 

 and especially its extremities are comparatively much 

 more dilated. Its head is transversely elongated, passing 

 into a curved and projecting prominence, which answers 

 to the ulnar tuberosity. The radial crest is strongly 

 developed, and does not extend beyond the proximal third 

 of the length of the bone. The transverse diameter of 

 the distal extremity is nearly rectangular to that of the 

 proximal. The whole of this part of the bone is much 

 dilated, particularly by a broad trenchant crest running 

 along the radial border of the bone. Of the two condyles 

 the radial one is much more prominent one and projects 

 towards the anterior side of the bone. In all these parti- 

 lars G. neictonii resembles G. rerus, all the ridges and 

 prominences being, however, much more developed. 



G. verus G. newtonii. 

 millims. millims. 



Length of the himierus 22\ 25 



Least width of the shaft 2 3 



Transverse diameter of proximal end. . 5^ 9 



Transverse diameter of distal end. ... 6^ 10 



