114 Cincinnali Society of Natural History. 



twenty-five inches, to the south-west of the stump and of the 

 entrance. Observe, so far as observation can decide, how the 

 marmot carried the larger portion of the sand around from 

 the entrance to the soutluvest side of the stump. A marmot 

 was known to enter this burrow the day before I laid it open. 



EXCAVATION H. 



The most extended burrow I had occasion to excavate was 

 excavation H. It was on a hillside, west of a beaver meadow, 

 the side of the hill here facing south of east. The upper or 

 northerly entrance was distant from the southerly one eleven 

 feet in a direct line. Below, south of the upper hole, was a 

 sand pile three feet, six inches long, but not as wide. A sand 

 mound at the lower entrance B was about forty-eight inches 

 from north to south (down the hill) and about three feet, six 

 inches wide. A surface track between the holes was found, 

 indicated by the dotted-line-marked track. The runway, 

 from the northern entrance, extended west of south four feet, 

 six inches to a, and the runway from south entrance B 

 extended due north to a- and the adjacent ends a, a- of these 

 runways were connected by a lair or nest twenty-six inches 

 long. 



A runway to b, distant six feet, one and a half inches from 

 a, in a south-easterly direction, entered at b in a smaller nest, 

 at a depth of forty-four and a half inches below the surface. 

 The runway then continued from the other end of this nest 

 for six feet, nine inches a little north of east to C, and then 

 five feet, six inches to d, where it terminated in a circular 

 nest forty-nine inches below the surface. Returning to point 

 C, from here a branch runway extends south-east forty-two 

 inches and terminates in a smaller pocket nest twenty-two 

 inches deep (below the surface). This was not all. From 

 the nest a, a- (first mentioned), a second branch runway 

 extended three feet, ten inches to a'', the center of a large nest, 

 twenty three inches long by seventeen across; thence north- 

 east to a"*, which from the point a'' is three feet, six inches. 



Just beyond here a sixth nest was found, and beyond the 

 latter the excavation was conducted to a*. This entire 

 system of burrows smelled strongly of marmots. At a, their 



