422 



GEOGRAPHICAL ZOOLOGY. 



[part IV. 



The PipidcG are toads without a tongue or maxillary teeth, and 

 with enormously dilated sacrum. The only species of Piim is a 

 native of Guiana. 



Family 22.— DACTYLETHPJDxE. (1 Genus, 2 Species.) 

 General Di.stribution. 



Neotropical 



SUB-REGiONS. 



Neakotic 

 sub-kegions. 



Pal,earctic 

 Sub-regions. 



Ethiopian 



Sl'B-B£GION.S. 



1.2.3 



Oriental 

 Sub-regions. 



Australian 

 Sub-regions. 



The Dactyletliridaj are Toads with maxillary teeth Lut no 

 tongue, and with enormously dilated sacrum. The species of 

 Dadijldlirct are natives of West, East, and South Africa. 



General licmarJcs on the Distribution of the Amphihia. 



The Amphibia, as here enumerated, consist of 22 families, 

 152 genera, and nearly 700 species. Many of the families have a 

 very Ihnited range, only two (Ranidic and Polypedatidic) being 

 nearly universal ; five more extend each into five regions, while 

 no less than thirteen of the families are confined to one, two, or 

 three regions each. By far the richest region is the iSTeotropical, 

 possessing 16 families (four of them peculiar) and about oO 

 peculiar or very characteristic genera. Next comes the Austra- 

 lian, with 11 families (one of which is peculiar) and IG pecu- 

 liar genera. The Nearctic region has no less than 9 of the 

 families (two of them peculiar to it) and 15 peculiar genera, 

 13 of which are tailed Batrachians which have here their 

 metropolis. The other three regions have 9 families each ; 

 the Palaiarctic has no peculiar family but no less than 15 

 peculiar genera ; the Ethiopian 1 family and 12 genera peculiar 

 to it ; and the Oriental, 19 genera but no family confined to it. 



It is evident, therefore, that each of the regions is well 

 characterised by its pecidiar forms of Amphibia, . there being 

 only a few genera, such as Uyla, liana, and Lufo which have a 

 wide range. The connection of the Australian and Neotropical 



