MUSEUM OF COMPAKATIVE ZOOLOGY. 31 



north of the Richmond station, extends for a mile in a southeasterly 

 direction. 



A small group lies at the corner next south of the Cheever Ore 

 Bed, while in Stockbridge, two miles southeast of this group, and one 

 mile from Mr. Butler's, along the road running along the west side 

 of Lake Mahkeenac to Curtisville, begins another group, which extends 

 for a mile and a half in an E. S. E. direction, passing along the north- 

 ern shore of Lake Mahkeenac, and finally dwindling away and becom- 

 ing imperceptible at a point situated about half a mile east of the 

 bridge which crosses the eastern angle of the lake. 



The gaps in this train are still greater than those in the second, and 

 the boulders are fewer and of smaller size. The largest boulders of the 

 train, averaging ten or twelve feet in length, are in the most westerly 

 group, and the smallest are in the most easterly, namely, along the 

 shore of Lake Mahkeenac, where the average length is not over a foot 

 and a half. In shape, and in freedom from abrasion, these boulders 

 resemble those of the other trains. 



d. Minor Train. 



Another fragmentary train of chloritic schist boulders lies to the 

 northwest of the principal train, its most westerly group being situated 

 at the corners, a mile and a quarter north of Mr. Oscar Smith's, and the 

 next being three quarters of a mile to the S. S. E., a few rods south- 

 west of the bridge over the Boston and Albany Railroad. Half a mile 

 east of Mr. Smith's is another group belonging to this ti-ain, at the 

 northern end of a swamp which extends in a S. S. E. direction, while 

 half a mile distant, at the southern end of the same swamp, another 

 group begins, and extends for three quarters of a mile to the summit 

 of the Western Branch of the Lenox Range. Upon the westeni slope 

 of Prospect Hill, Lenox, lies a small group of boulders, which is the 

 most easterly of this train that has been observed. 



The boulders of this train are fewer than those of any of the others, 

 there being, probably, not over a hundred in all, but in size, shape, and 

 amount of abrasion they resemble those of the corresponding parts of 

 the second and third trains. 



e. Summary. 



Not a single chloritic schist boulder was found west of the crest of 



the Canaan and Lebanon Range, and it is probable that the four trains 



which have now been described include all the boulders of that rock to 



be found within the region studied, except occasional boulders scattered 



