246 
Philippine Journal of Science 
1920 
the mouth ; the arrangement of the vomerine teeth varies consid- 
erably, beginning sometimes on the anterior inner edge of the 
choanse, sometimes at some distance from them, sometimes in 
advance of the anterior level, sometimes nearer the hinder level, 
or they may extend to or behind the transverse palatine ridges. 
Remarks . — I have no doubt that the specimens are correctly 
referred to this species. All have small vocal sacs, a character 
which is not mentioned by Stejneger in his specimens. Bou- 
lenger states that R. modesta is a smaller species than R. 
macrodon. It is possible that he had not examined the largest 
specimens. Stejneger compares his specimens with R. macrodon 
only and makes no mention of its relation to R. modesta 
Boulenger. 
Rana magna is the largest of the Philippine frogs. Specimens 
are found in the immediate vicinity of water, usually along the 
banks of small mountain streams or about pools. When dis- 
turbed they at once take refuge in the water. Their eggs are 
deposited in water. Eggs taken from the ovary of a female in 
the Bureau of Science collection measured 2.5 millimeters in 
length. 
Rana leytensis Boettger. Plate 2, fig. 1. 
Rana leytensis Boettger, Zool. Anz. 16 (1893) 365; Boulenger, Proc. 
Zool. Soc. London (1897) 229. 
Description of species. — (From No. 1040, E. H. Taylor col- 
lection; collected at Bunawan, Agusan, Mindanao, P. I., 1912.) 
Vomerine teeth in two oblique series, arising from the inner edges 
of the choanse, but lying for the most part behind them, separated 
from each other by a distance about half the length of a single 
group; two distinct, enlarged, sharp teeth in anterior part of 
lower jaw; choanse not large, distance between them equal to 
distance of nostril. from eye; head longer than wide, the canthus 
rounded angularly ; snout rather rounded ; upper part of loreal re- 
gion nearly vertical, lower part obliquely sloping, leaving the lores 
concave ; nostril one and a half times farther from eye than end 
of snout; distance between nostrils equals their distance from 
eye; eye large, more than four-fifths the length of snout; tym- 
panum large, distinct, about one-half the size of eye, separated 
from eye by a distance about one-half its diameter; interorbital 
regiori equal to width of a single eyelid; skin on anterior part 
of body above smooth, with longitudinal folds of unequal length ; 
an inverted V-shaped fold in middle of back; the most prominent 
folds are dorsolateral, beginning behind eye, and not continuous 
with the very distinct supratympanic fold which continues to 
near insertion of arm; posterior part of body with tubercles, 
