544 



THE 



rrnM.isT [VoL.XL 



^Yallace ('()9, p. 3S) wlio evidently ihroimh rrn»r cxjmofraTnl the 



name is derived from the presence of (he Miiall deniial fhips seen 

 especially at the heel. 



web-like expansions of skin which aUo extend^ l)ei\veeii the two 

 outer metatarsals. Memhrane^ are develojied a-> weH in front and 

 behind thearms, rudinient^of the pn'paiai;inni ->een in hiuh»'i" tonns. 

 The figure (Fic;. 3), whi< h i. nn.dified from that <.f Dunieril and 



a very conservative developni<Mit of^the para.-hute. though in the 

 majority ot specie^ the web extends not more than lialf the leiio-th 

 of the fingers. In Rhacophorus pnrrla/is the total alar expanse is 

 about three square inches ((radowi. This would nnplv rather 

 feeble soaring powers. 



