204 MISS JOAN B. I'ROCTER ON THE YARIATIOX 



Pelobates Wag]. 



P. fascios Laur. — Scapula well developed, thick, oiice and a 

 half as long as prsecoracoid. Shaft oblong, twice as long as 

 broad ; pars acromialis broad, the lower border of its outer 

 suT'face with a ridge which runs round the glenoid cavity ; pars 

 glenoklalis much depressed ; dividing cleft short, forming an 

 oval foram-en pierced horizontall}-. 



Example. 



Length of prsecoracoid 10 units. 



„ scapula (lower edge) 15 „ 



„ shaft 10-4 „ 



Breadth of „ (distal end) 5 „ 



Length of supra-scapula (lower border) 15 „ 



P. cuUripes Cuv. — Scapvila precisely as in P.f^cscics. 



Pelodytes Fitz. 



P.punctatus Daud. — Scapula mnch reduced, squarish in shape. 

 Shaft shorter than broad at distal end ; pars acromialis as broad 

 as long, lower border of its outer surface forming a prominent 

 ridge running round the glenoid cavity ; pars glenoidalis much 



Text-fisjure 7. 



^X 



PectovA sn'il^e ot Pelodt/tes puncfaius. X2. 

 (a) from without; (6) scapula from within. 



depressed, snbcircular ; dividing cleft short, pierced horizontally, 

 only visible when viewed obliquely. 



Uxample. 



Length of prpecoraeoid 10 units. 



,, scapula (upper border) 5-6 „ 



„ shaft 4-4 „ 



Breadth of „ (distal end) 4-4 „ 



Length of supra-scapula (upper edge) 9*4 „ 



In shape the scapula of Pelodi/tes is very similar to that of 

 Paheohai7-acJms, which it resembles in many ways. Palceoba- 

 trachas, however, lacks the proximal dividing cleft, which, 

 though outwardly invisible, is present in Pelodytes. 



Batkachopsis Blgr. 



B. melanopyga Doria. — Scapula well developed, about once and 

 a quarter as long as prsecoracoid ; slender in the middle, 



