Marnock's Fro 



g- 



Plate LVI. (xi). i-6. 

 Adults. 



Syrrhophus marnockii 

 Cope. 



Range: Helotes near San 

 Antonio, San Marcos and 

 Austin, to Chisos Mts. (Drs. 

 F. M. & H. T. Gaige) Texas. 



Habitat: Cracks, crevices, 

 caves in limestone ledges of 

 the hills and ravines. We 

 made our captures under 

 large flat stones near lime- 

 stone ledges, one above the 

 wall of a ravine. 



Size: Adults, 7/8-1 3/5 

 inches (22-39.5 mm.). 



General appearance: This 

 small, flattened frog has a 

 long flat head, with a broad 

 space between the eyes,which 

 are large and prominent, in- 

 dicating nocturnal activity. 

 In general color, the back is 

 greenish, spotted with brown, 

 the under parts, light-brown- 

 ish vinaceous, the legs cross- 

 barred. The nostril is far in 

 front of the eyes, which are 

 as far apart as the breadth of 

 the hump. The skin is 

 smooth. There are one or two 

 white or deep colonial buff" 

 tubercles below and behind 

 the tympanum. 



Structure: Small flattened 

 body; eyes prominent, widely 

 separated by broad flat space; 

 fingers and toes long and 

 slender with prominent tuber- 

 cles, which if viewed from the 



I46 



