6 University of Michigan 



(capsule 8 mm., yolk 5 mm. in diameter), unpigmented, and laid 

 in a rosary-like string twisted about to form a large circular mass 

 which was attached to the lower surface of the stone. The eggs 

 were brought in and development continued until August 13, 

 when we were unable to get cold water for them and were forced 

 to preserve them. At this time they showed no trace of pigmenta- 

 tion. The strings of eggs were so entangled that it was impossible 

 to count them, but two of the females mentioned above contained 

 thirty-five (sixteen, left side, seventeen, right) and forty-nine 

 (twenty-four, left side, twenty-five, right) respectively. 



The tadpoles are most curious, both in habits and appearance. 

 They cling with the mouth to the stones in the creeks. One 

 finds them in the swifter water and quieter pools alike, always 

 with the tail pointing downstream. They may be in plain view 

 or may appear after the stones have been moved. When disturbed 

 they always swim upstream; when the water is so swift that it 

 carries them down they quickly attach themselves to a rock. It 

 is not unusual to find them clinging to rocks in the falls. They 

 do not swim for great distances and were not observed moving 

 about in the water when they had not been disturbed. Occa- 

 sionally they wriggle about over the surface of the stone to which 

 they are attached. It was sometimes possible to pick them up 

 on a stone and transfer them to a bottle, or if one moved very 

 quietly they could occasionally be induced to attach themselves 

 to a finger, or they would adhere to the stone so firmly that it was 

 difficult to dislodge them without injury. They seldom survived 

 the trip home in a bottle; they would attach themselves to the 

 glass above the water and were usually dead in an hour or so. 



The immature Ascaphus looks not unlike a large Bufo tadpole, 

 but the resemblance is purely superficial. It ma}^ be perfectly 

 black or blackish brown thickly speckled with black. The eyes 

 are all black, and there is no trace of iridescence in the coloration. 

 The tail may be either all dark like the body, or obscurely or 



