210 miss joan b. procter on the variation 



Cystignathid^. 

 In this family the scapula is extremely variable. It may be 

 slender or stoutly formed, shorter than the prsecoracoid or 

 abnormallly elongated. The range of variation is large as in 

 Hylidaj, and very much greater than in any other families of the 

 Arcifera. 



PsBUDis Laur. 



P. paradoxa* L. — Scapula equal in length to the prjecoracoid, 

 rather stout, parallelogr.ammic in shape ; superficially similar in 

 sha.pe to that of Pelodytes jntncUvtibs, Upper border of shaft 

 bearing a thin sti'aight-edged crest ; jyars acromialis broader 

 than long ; pars glenoidalis narrow, obtusely pointed, partially 

 separated from pars acromialis by a notch forming part of a 

 small oval foramen piei'ced obliquely. 



Exampie. 



Length of prfecoracoid 10 nnits. 



,, sca,])ula 10 ,', 



,, ,, shaft 6*7 ,, 



Breadth of ,, (distal end) 6"7 ,, 



,, ,, (middle) 6*7 ,, 



Length of supra-scapula 1 3'4 „ 



Calyptocephalus D. k B. 



G. gayi D. & B. — Scapula normal in its proportions, but large 

 in comparison with the other bones of the pectoral girdle. 

 Longer than prsecoracoid. 



Telmatobius Wagl. 



T.jelksii Ptrs. — In this species all the bones of the pectoral 

 girdle are extremely stout in comparison with their length. 

 Scapula equal to the prfecoracoid in length, stout. Shaft 

 squarish ; pars acromialis and 2^<^'>'S glenoidalis both well de- 

 veloped, separated proximal ly by a very small cleft or central 

 foramen. 



Uxanijyle. 



Length of jirtecoracoid 10 units. 



,, scapula, (upper border) 10 ,, 



„ „ shaft 5-3 „ 



Breadth of ,, (distal end) 6*7 „ 



„ „ (middle) 4 „ 



,, pars acromdalis 4*7 ,, 



,, 2:)ars fflenoidalis 3*3 ,, 



Length of supi^a-sca j)ula 12*3 „ 



Elosia Tsch. 



E. hiifonia Gir. — Scapula equal to the prfecoracoid in length, 

 rather slender, but of normal proportions. 



* Bones pale green, as in Happia cJiIorostea E. Blgr. 



