208 MISS JOAN B. PROCTER ON THE VARIATION 



Breadth of scapula (distal end) 1 0*2 units. 



(middle) 2-6 „ 



,, pars acromicdis 3*5 ,, 



„ pars glenoidalis , 1*7 ,, 



,, central foramen 2'2 ,, 



Length of „ „ 4-4 „ 



,, 2 }ars acromicdis 3"5 ,, 



„• pars glenoidalis 1'7 ,, 



,, supra-scapula 1 4'8 „ 



Text-figure 9. 



Pectoral girdle of Phi/ Uo medusa bicolor, X2; from without. 



P. burmeisteri Blgr. — Scapula as in P. dacnicolor. 

 This form of scapula is highly characteristic of the genus 

 Phyllomedusa. 



Triprion Cope. 



T. petasatus Cope. — Scapula as in Hyla maxima. 



Bufonid^e. 



In this family the scapula is usually normal in its proportions ; 

 the pars glenoidalis is equally developed to the pars acromialis. 

 No important variations occur. 



Eupemphix Steind. 



E. nattereri Steind. — Scapula normal in its proportions ; 

 slightly longer than praecoracoid ; slender in the middle ; similar 

 in shape to that of Batrachopsis melanopyga. Dividing cleft 

 between the two pars short. 



Bufo Laur. 



B. indgaris Laur. — Scapula normal, upper border about as long 

 as praecoracoid, lower border a little longer. Shaft stout, sub- 

 triangular ; pars acromialis somewhat diamond -shaped,, with a 

 straight, oblique upper edge; pars glenoidalis much depressed, 

 narrower, but equal in length to the pars acromialis, from which 

 it branches, forming a Y of which the shafts represent the tail; 

 pars glenoidalis widely separated from coracoid by paraglenoid 



