Strecker—N otes on the Robber Frog. 77 
Living examples of the above mollusks were found 
only on the west slope. Altitude about the same as that 
of the other station. — 
Notes on Breepine Hastrs. 
This species breeds unusually early in the year. Mar- 
nock informed Cope’ that the eggs were hatched in win- 
ter. Here in central Texas the breeding season is later 
than it is in Bexar County and the eggs are deposited 
early in February. If the eggs were deposited before 
the 9th of that month in the present year, they were sub- 
jected to some of the hardest freezes we have had in 
years. On the 9th and 10th the ground was covered with 
two inches of snow. A few days later the weather was 
warm and clear and melted snow filled the hollows in 
many of the gulches that are usually dry at this season. 
On March 5th, a number of tadpoles were found in 
small pools in the gully three miles north of town. They 
were in two stages, the larger ones having the hind limbs 
well developed. In form these larvae were short and 
round bodied, with slender, but rather short, tails. Ina 
specimen 36 mm. in total length, the distance from muzzle 
to anus was 14mm. In a smaller example, the tail was 
only 4 mm. longer than head and body. 
Color above deep brown, appearing blackish in water. 
Beneath silvery white. Under a glass the superior sur- 
faces present a peculiarly mottled appearance, much as 
though several tints of brown paint had been thrown to- 
gether without being thoroughly mixed. Sides reticu- 
lated with blackish brown lines. To the naked eye, the 
lateral line sense organs appear as continuous yellow 
stripes on the sides. From above the head presents a 
much narrower outline than is found in tadpoles of the 
families Hylidae and Ranidae. The upper lip has two 
rows of teeth, the lower three. : 
These little ‘‘polly-wogs’’ are very active and on being 
disturbed conceal themselves among leaves in the bottoms 
7 Bull. U.S. Nat. Mus. 17. 1880. 
