RAN A. 



277 



[5], iv, 1872, p. 201) appears to have been the first 

 to record blue specimens of B. esculenta ; others have 

 since been examined by Pfluger and by Ley dig at 

 Bonn, by Norman Douglass in Baden, and by myself 

 at Frankfort-on-the-Main. I have also received a 

 specimen from Basle through the late Dr. F. Miiller. 



Brown specimens, without or with little green, as 

 in the specimens of var. lessonse from Norfolk, are 

 not uncommon near Berlin. The var. sylvatica of 

 Koch is based on such a specimen. I have examined 

 the type of the latter, a female, which measures 67 

 mm. from snout to vent ; hind limb 92 ; tibia 26 ; 

 foot 27; inner toe 6; inner metatarsal tubercle 3. 



Measurements (in millimetres). 



The range of variation of the somewhat complex 

 assemblage which I have endeavoured to define as the 

 typical form is very great indeed, and forms a gradu- 

 ated series leading from the form ridibunda to the 

 form lessonse. I must confess that the line drawn 



