210 MISS JOAN B. PROCTER ON THE VARIATION 



CySTIGNATHIDjE. 



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 

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

 Arcifera. 



Pseudis Laur. 



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

 rather stout, parallelogrammic in shape ; superficially similar in 

 shape to that of Pelodytes punctatus. Upper border of shaft 

 bearing a thin straight-edged crest ; pars acromiaUs broader 

 than long; pars glenoidalis narrow, obtusely pointed, partially 

 separated from pars acromialis by a notch forming part of a 

 small oval foramen pierced obliquely. 



Example. 



Length of prsecoracoid 10 units. 



,, scapula 10 ,, 



,, ,, shaft 6"7 ,, 



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



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



Length of supra-scapula 1 34 „ 



Calyptocephalus D. & B. 



C. 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 pectoi'al 

 girdle are extremely stout in comparison with their length. 

 Scapula equal to the prsecoracoid in length, stout. Shaft 

 squarish ; pars acromialis and pars glenoidalis both well de- 

 veloped, separated proximally by a very small cleft or central 

 foramen. 



Example. 



Length of prsecoracoid 10 units. 



,, scapula (upper border) 10 ,, 



ii n shaft 5-3 „ 



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



„ i, (middle) 4 „ 



,, pars acromialis 4 - 7 ,, 



,, pars glenoidalis 3 - 3 „ 



Length of supra-scapula 12*3 ,, 



Elosia Tsch. 



E. bufonia Gir. — Scapula equal to the prsecoracoid in length, 

 "rather slender, but of normal proportions. 



* Bones pale green, as in Rappia cMorostea E. Blgr. 



