Rana clamitans 359 



In 1922 we found different types of habitats in addition to the above rec- 

 ords. In Civil War times at Camp Pinckney the Confederate Army dug five or 

 six large pits. They were going to hide turpentine in barrels in them if need 

 be. These ponds are now filled with water. In these ponds, some of which are 

 very much shaded, were several green frogs. The surface of the water was one 

 continuous mat of fine green vegetation. On July 24 in one of these ponds 

 we found three fresh masses attached to the base of large grass (4 feet high) 

 in the middle of the pond. On the road south of Folkston and south of Spanish 

 Creek is a moist woods, on the side a high sandy ridge. Here in very small 

 sphagnaceous spring ponds beside the road we found eggs on the moss in 

 the water. 



On July 9, 1922, at Thompson's Landing in a cut off pool left by high 

 water of St. Mary's River we "found a male R. clamitans at the edge of this 

 pool under some overhanging rootlets to which a film of eggs was attached. 

 They are almost hatched. These are not all at the surface. Rains have raised 

 the level of the pond. These wooded banks of the St. Mary's River have 

 considerable shade." 



Period. In the north the extreme dates for ovulation have been May 23 

 and August 10. The period of greatest ovulation has been in June and first 

 of July. 



In 191 2 our data for Okefinokee Swamp is: "On June 2, 19 12, on Billy's 

 Island near Billy's Lake we found in ponds at the edge of the island some green 

 frog eggs. On the following day in a shallow pond where the water was i 

 foot deep more were recorded. On June 9, we found another mass and by 

 June 12 these eggs were hatching. Finally on June 12, 1912, on the north 

 edge of Lee's clearing we found a pond 15 x 10 feet and 3x4 feet deep in 

 places. Here we took three male R. clamitans. In the pond were Gambusia, 

 narrow-mouthed toad, meadow frog and toad tadpoles. Two masses of eggs 

 were found, one fresh and the other hatching. The masses were films on the 

 surface of the water as with our northern forms." 



In 192 1 the first eggs found came July 5 and the last record July 15. In 

 1922 we found eggs at Thompson's Landing, St. Mary's River July 9, south 

 of Spanish Creek July 15 and at Camp Pinckney (near Folkston), St. Mary's 

 River July 24. In both years July seems the climax month. We thus have a 

 recorded period from June 2- July 24 for the three years of observation. 



Temperature and humidity. In 192 1 on July 3 we had very hard rains in 

 the swamp; on the 4th, Waycross had an inch. Humid weather preceded the 

 high period of ovulation July 4-5. No minima went below 69° or 70° and 

 maxima hovered from 88°-92°. On July 15 minima ran from 69°-72° and 

 rain occurred throughout the Okefinokee area. 



In 1922 the day before Julygthe minima were 6t°--]2° the maxima 82°-93° 

 and precipitation .25 at St. George, July 9. Our records for July 8 at Chesser 

 Island were temperatures 92° at 2 p.m., shower at 5:30 p.m. and 73° about 

 midnight July 8-9, and eggs found July 9. On July 15 and the day preceding 

 ovulation at St. George, Ga., minima are 66°-68'', maxima 94°-96°, our 

 lowest at Chesser Island 68° and highest 88° but no rain in either place. On 



