Bi(fo terrestris 151 



7y 7-5) 7-5) 7-5) 7-5) 7-5> 7-5» 8, 8, 8, and 8.5 mm. In 192 1 our field notes 

 seemed to imply 8-10 mm. in size, but access to two series reveals the fol- 

 lowing: Several taken April 27 are 6.5, 7, 7, 7, 7, 7.5, 7.5, 7.5, 7.5, 8, 8, 8, 8, 8, 

 8, 8, 8, 8.5, 8.5, 8.5, 8.5, 9, 9, 9, 9, 9, 9-5, 9-5, 9-5, 1°, 1°, 10, 10.5 mm.; or five 

 of June 16 prove 8, 8, 8, 8.5, 9, 9.5 mm. 



In 1922 on July 24 we secured a series of sizes as follows: 7, 7, 7.5, 7.5, 

 7-5, 7-5, 7-5, 7-5, 7-5, 7-5, 7-5, 7-5, 7-5, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 

 8.5, 8.5, 8.5, 8.5, 8.5, 8.5, 8.5, 8.5, 8.5, 8.5, 9 transfg, 9, 9, 9.5. One specimen 

 appearing with this lot, is 12 mm. but it is far past transformation. 



Apparently the range is about 6.5 — 10 — 10.5 mm., the mode 8 mm., 

 average 8 mm. 



GROWTH 



If transformation comes at 6.5-1 1.5 mm., and males reach 84 mm. and 

 females 92 mm., how long a period elapses from emergence from tadpole 

 to the maximum sizes? Of if maturity comes at 42 mm. for male or 44 mm. 

 for female, but better about 50 mm. or more for each, what is the interval 

 between transfbrmation and maturity? 



Ninety-six specimens (U. S. National Museum material, 7 lots) taken 

 in April by Dr. E. A. Mearns at Lake Kissimee seem to fall into the following 

 groups: 37-47 mm.; 48-59 mm.; 59-68 mm.; 69-78 mm. Some other ma- 

 terial in U. S. National Museum (158 specimens) falls into the following pre- 

 sumptive lots: 16-25 mm.; 25-35 mm.; 35-47 mm.; 48-59 mm.; 60-68 mm.; 

 69-78 mm.; 79-85 or 88 mm. On the basis of the 191 2 Okefinokee material, 

 the material seems to fall into groups 13-18 mm.; 27-29 mm.; 43- mm.; 

 48-59.5 mm.; 61.5-68 mm.; 70- mm. Our 1921 and 1922 material shapes 

 as 6.5-10 mm.; 13-19 mm.; 21-28 mm.; 34-37 mm.; 44 mm.; 48-56.5 mm.; 

 58-66 mm.; 69-79.5 mm.; 81-86 mm.; 92 mm. 



Apparently this species transforms at 6.5-10 or 11 mm.; at one year may 

 be 13-25 mm.; at two years 25-35 mm.; three-year-olds 34-47 mm.; 48-59 

 or 60 mm. for four-year-olds; 59-66 mm. for five-year-olds; 69-78 or 79 mm. for 

 six-year-olds; 79-86 or 88 mm. for seven-year-olds; 90 mm. eight years or more. 



The first two years of presumptive growth may be interpreted wrongly. 

 This species breeds over a long period and so it will be hard to arrive at 

 presumptive growths without actual records of marked specimens, e.g., our 

 13-25 mm. may not be correct, for on June 16, 1921, we took transformation 

 sizes from 8-9.5 mm. and three individuals 17, 21 and 28 mm. Should first 

 year's growth be 17-28 mm. instead of 13-25 mm.? That we dare not say. 



Transformation comes at 6.5-10 or 11 mm. When do the parotoids, 

 cranial crests and tympana appear? We have examined our material of 

 sizes from 11-35 mm., one 12.5 mm. specimen taken May 22, 1912, ''ap- 

 parently past transformation" has none of these three structures. A series 

 of seven specimens taken May 31, 192 1, and ranging from 13-16 mm. have 

 not the tympana, crests or parotoid definitely outhned. In 1912 (May 15- 

 June 24) fourteen different accessions of material from 11-16 mm. in length 

 reveal none of these structures except two lots of 16 mm. One 16 mm. indi- 

 vidual had them not and two had no crests nor tympana but the parotoid 



