FROGS AND TOADS. 



65 



527-534), and Gi/slignathidce {5Q1-B\2), and is characterised by the 

 circumstance that the coracoid bones overlap'one another on the chest 

 instead of meeting by their edges in the middle line (fig. 63). The 



Fig. 64. 



Hind Foot of a Tree Frog {Hylobatcs jjalmatus) to show expanded 

 tips of the toes. 



Common Toad {Bufo vulgaris, 515) and the great Brazilian Water- 

 Toad {B. marinus, 520) are shown. The CystignathidcB dififer from 

 the other families in having the transverse processes of the sacral 

 vertebra cylindrical, instead of expanded at the extremities. Of the 



Fig. 65. 



The Pouched Frog (Nototrcmx marsuplatum), with eggs in pouch. Ecuador. 



(No. 533-) 



four families in which these processes are ex]iande(l, the HylidcB are 

 distinguished by having claw-shaped terminal toe-bones. Of the 

 three families without claw-shaped terminal toe-bones, the Discoglos- 



