Putnam.] 
118 
[December 15, 
about a thousand feet elevation, and yet it is broken down by 
eight gaps nearly to sea level or below. The ponds that occupy 
these gaps are placed transverse to the range with their middle 
near its axis. Professor Agassiz considered that some of these were 
held in by terminal moraines at their southern end; but nothing 
of definite morainal form was found. The barriers, where exam- 
ined, resembled more closely an uneven deposit of ordinary drift 
or ground moraine. 
Glacial action is conspicuous over the whole island. The moun- 
tain summits are all rounded, and when protected from weath- 
ering, sometimes show polishing or striation : boulders of foreign 
rocks are common even on the summits. Along the shore, the 
drift shows well scratched pebbles and boulders, and is therefore 
probably of original, unstratified, subglacial origin, somewhat 
modified in surface form by the sea during its former higher level. 
Excellent roches moutonnees are laid bare as the waves wash 
away the drift. 
The prevalence of steeper slopes on the eastern side of the 
mountains, conspicuous in Newport, Dry, Sargent’s, Brown’s and 
Dog mountains, is not the result of glacial erosion, but depends 
on the position of a prevalent set of joints frequently occupied by 
dikes, dipping steeply to the west. The form of the islands about 
Bar Harbor is the result of the northerly dip of their strata. 
Mr. J. S. Kingsley described some interesting points in the 
anatomy of Caudina, one of the Holothurians which has been 
but little noticed by anatomists, and is remarkable for a peculiar 
circulatory system, recalling in some respects the lacteals of the 
higher animals . 1 
Mr. Putnam said that it gave him great pleasure to call atten- 
tion to the important work which Dr. Edward Palmer, had done 
in Mexico, while acting under his direction for the Peabody 
Museum of Archaeology at Cambridge. Dr. Palmer had recently 
returned from the southwestern portion of Coahuila where he 
3 Published in the Mem. Peabody Acad. Sci., Salem, Mass. 
