COPEIA 99 



The only other Long Island record for A. jef- 

 fersonianum was obtained at a point about 5 miles 

 east of the present location (see Copeia No. 8). 

 George P. Engelhardt, 



Brooklyn, N. Y. 



A ONE-LEGGED CRICKET FROG. 



On September 23, Cricket Frogs (Acris gryllus 

 crepitans) , were found abundant along the margins 

 of ponds in the sand dunes between Miller, Indiana 

 and Lake Michigan. The tadpoles of this species 

 were seen in the pond, as were also a few transform- 

 ing individuals. 



One of these Cricket Frogs (head and body 16 

 mm.), unfortunately not noted until after it had died 

 in a collecting bag, presents a malformation which 

 seems worthy of description. The right leg is absent, 

 and no scar is evident to indicate its recent loss by 

 injury; the skin is normal in both texture and colora- 

 tion over the area from which the leg should spring. 

 The skin of the abdomen is notably wrinkled toward 

 the missing member. Indeed the whole body poste- 

 riorly is twisted toward the right side, so that the left 

 leg, which is of the usual proportions, is forced into 

 a position in which it could fairly effectively perform 

 the normal function of both legs. 



The pelvic region, on dissection, shows some in- 

 teresting features. As just mentioned it is curved 

 toward the right. There is absolutely no trace of a 

 right femur, nor even of the acetabulum and labrum 

 cartilagineum, which are normally well developed in 

 this species. The right face of the pelvis is smooth, 

 and the right arm of the ilium is weak and cartilagin- 

 ous. The dextral sciatic plexus and nerve are also 

 atrophied. 



Whether this monstrosity is the result of a mu- 

 tation, or of a very early injury can not be stated. 



Carl L. Hubbs, 



Chicago, III. 



