ENGySXOMATID-E. 147 



<attachcd by two condyles, except in the geuus Brei'icej)s, where it is 

 conflueut with the sacrum. 



Noue of the genera have a fr on to-parietal foutanelle. 



The distal phalanges may be simple or T-shaped. 



This family includes terrestrial, aquatic, and burrowing types, but 

 no arboreal — Calhda, Bmchymenis, and others, generally regarded 

 as " tree-frogs," being merely aquatic or teri-estrial, in spite of their 

 digital dilatations. 



For the purpose of burrowing, cither the hind pair of limbs 

 {Hijpopaclins, Ob/phor/hssus, Cacopus, Brcviccps, &c.), or the front 

 pair (Ifemisus), are particularly strengthened and provided with 

 corneous sheaths. 



In the last'-named genera the mouth is very narrow, and those 

 Frogs may be considered " ant-eaters," similarly as the Bufonid 

 genus Ehinnjihninus. 



In more than half of the genera the pupil is erect. 



Synopsis of the Genera. 



I. Precoracoids present ; coracoids moderate, horizontal. 



Pupil horizontal ; tongue subtriaugular ; a cartilaginous omosternum. 



1. Rhinoderma, p. 1-18. 



Pupil horizontal ; tongue elliptical : no omosternum ; palate without 



ridges 2. Phryniectie, p. 119. 0^^^'^e^^^^^<^ 



Pupil horizontal ; tongue elliptical ; a dorsal bony shield. 



3. Brachycephalus, p. 156. 



Pupil erect ; tongue elliptical ; palate without ridges. 



1. Melaiiobatraclius,p.l5G. 



Pupil horizontal ; tongue heart-shaped. 



5. Sphenophryne, p. 157. 



Pupil horizontal ; tongue elliptical ; a denticulated dermal ridge 

 across the palate between the choana), and another in front of the 

 oesophagus 6. Calophrynus, p. 157. 



Pupil rouud ; tongue large ; toes free ; anterior portion of the 

 sclerotica ossified 7. Stereocyclops, p. 158. 



Pupil erect ; tongue elliptical ; a dermal ridge across the palate 

 between the choanaj, and another in front of the oesophagus ; toes 

 webbed at the base 8. Hypopachus, p. 159. 



II. No precoracoids. 



Pupil erect ; tongue elliptical ; tympanum hidden ; toes free. 



9. Engystoina, p. 100. 



Pupil erect; tongue elliptical; tympanum hidden ; toes more or less 



webbed 10. Microhyla, p. 103. 



l2 



