676 The American Naturalist. [August, 
erystalline rocks, and the Triassic and Cretaceous cover exten- 
Sive areas. 
The Fiji Islands are even more isolated, being surrounded 
by a sea of 2000-4000 m. South of this group the soundings 
show 4000-6000 m.,and east from the Tonga Islands even 6000- 
8000 m. But on the Fiji Islands we find three species of frogs : 
Cornufer dorsalis A. Dum., only known from the Solomon 
Islands, besides two peculiar species, Cornufer vitianus A. Dum. 
and C. unilineatus Peters. 
The genus Cornufer Tschudi shows the following interesting 
distribution (Boulenger: Catalogue Batrachia Salientia s, 
Ecaudata, London, 1887, p. 107—111). 
1. Cornufer unicolor Tschudi. New Guinea. 
2. Cornufer guentheri Boul. Philippines. 
3. Cornufer mayeri Günth. Philippines. 
4. Cornufer jagorii Peters. Samar Island. 
5. Cornufer corrugatus A. Dum. Philippines, New Guinea, 
Duke of York Island. ; 
6. Cornufer punctatus Peters & Doria. New Guinea. 
7. Cornufer guppyi Boul. Solomon Islands. 
8. Cornufur solomonis Boul. Solomon Islands. 
9. Cornufer dorsalis A. Dum. Solomon and Fiji Islands. 
10. Cornufer vitianus A. Dum. Fiji Islands. 
11. Cornufer unilineatus Peters. Great Viti Island (Fiji I.). 
A still more peculiar fact is the presence of a very large 
Iguanoid Lizard Brachylophus fasciatus (Brongn.), also found on 
the Friendly Islands. The nearest relatives of Brachylophus 
Cuv. are Conolophus Fitz. and Amblyrhynchus Bell from the 
Galapagos ; Iguana Laur., Tropical America ; Metopoceras Wag- 
ler, San Domingo ; Ovehure Harlan, West Indies (Cuba, Jamaica, 
Bahamas); and Ctenosaura Wiegm., Central America. 
Of the 50 genera of Iguanide 47, with over 300 species, are 
American; two genera, Chalarodon Peters, with a single species, 
and Hoplurus Cuv., with three species, are found in Madagas- 
car. This is certainly a very interesting case of distribution. 
The genus Enygrus Wagler, a snake of the family Boidæ 
(Subfamily Boinæ) is repreni by four species, which show 
the following distribution :” 
1 Boulenger, George Albert. Catalogue of the Snakes in the British Museum. 
(Nat. Hist.) Vol. I, p. 104-109, 1893. 
