4IO . Frogs of the Okefinokee Swamp 



Some of the eggs taken July 14, 1923, at Onekio, N. Y, measured from 

 1. 3-1. 6 mm. in vitellus, average 1.4, mean 1.4; 2.4-3.0 mm. for the inner 

 envelope, average 2.7 mm.; and 5.6-6.6 mm., average 6.3 mm. for outer 

 envelope. As development proceeds the outer envelope may exceed 7.0 mm. 

 Mr. Bishop made a field measurement and examination. He writes "The 

 individual eggs have 3 envelopes visible with a hand lens: ist closely sur- 

 rounds the egg; 2nd about 3 mm. diameter; last 3rd 3/8 inch." The first 

 is the vitelHne membrane and the 3/8 inch envelope is between 8 and 9 mm. 

 It is possible some of the older eggs have the envelopes enlarged from 6-7 

 mm. to even 8 or 9 mm. 



HATCHING PERIOD 



The two egg masses (quite fresh) taken July 14, 1923 at Onekio hatched 

 July 18 and 19 or about 5 or 6 days after deposition. They were in shallow 

 pans with water between 60° and 70°. Doubtless in nature the hatching would 

 not be more rapid particularly with the deeply laid masses. On July 2, Mr. 

 Bishop and his associates could find no eggs at Clear Lake, Adirondack Lodge. 

 On July 13-15 he found several masses about at the hatching period. Pre- 

 sumably then II to 13 days is a maximum for this mid-summer form if the 

 eggs be deep in the water. 



MATURE TADPOLE 



Color description from life (July 11, 1923.) General coloration is citrine 

 or yellowish olive to dark olive or olive in specimens where hind legs begin 

 to develop well. On the back are small scattered dark spots more or less 

 uniform. When a tadpole has hind legs well developed (forelegs not out) 

 back becomes bluish black and the hind legs stand out by color contrast by 

 being a prominent citrine, buffy citrine, dull citrine or olive citrine. When 

 it reaches the four legged stage the spots of the posterior back are quite well 

 outlined. The mental region is grayish olive and more or less clouded. The 

 pectoral region has a little of greenish color. Where the sides join the belly 

 the body is mottled. Belly straw yellow, colonial buff or deep colonial buff. 



Tail. On the lower crest along the edge are many roundish cartridge 

 buff or pinkish buff spots. On the base of the musculature of the tail these 

 collect as pinkish cinnamon spots suggesting somewhat the light areas in a 

 similar place on Rana grylio tadpoles. On the rim of the dorsal crest some 

 of the cartridge buff spots are almost whitish. There are very few black 

 specks on the tail in mature tadpoles. A little later the crests have prominent 

 black spots on posterior half of the tail. In two-legged tadpoles a black 

 blotch or blotches appear with pinkish cinnamon spots at the base of the 

 tail and these are very prominent. 



Iris black and pinkish cinnamon. 



Some tadpoles one month old had on the dorsum three pairs of black or 

 dark spots; one on each nostril; one on or near each eye; and one on each side 

 of the middle of the back. The dark of each eye connected with the back 

 spot by an arc or semicircle of light color. This is the general appearance 

 without a lens. 



