POSTGLACIAL BIOTA OF THE GREAT LAKES REGION 155 



canal near Cheshire, thirteen miles north of New Haven, in diluvial gravel; 

 and at Sharon, in Litchfield County. In a later publication 121 a vertebra of a 

 mastodon was reported from a canal in the town of Berlin, twelve miles south- 

 west of Hartford. It was found in a tufaceous lacustrine formation containing 

 the shells of Planorbis, Lymnaea, and Sphaerium. 



IX. VERMONT 



The remains of an elephant (species not indicated) were found in a cut in 

 the Green Mountains, on the fine of the Rutland and Burlington Railroad in 

 1850. The location was in the Township of Mount Holly, at an elevation of 

 1360 feet «bove sea level. The remains, consisting of a tooth, two tusks and 

 several bones, were found in a muck bed, about 9 feet thick, resting on a gravel 

 bed. 122 Fossil wood was also found near the elephant bones, 13 feet beneath 

 the surface, covered by sand and gravel; the wood was cut by beaver's teeth. 

 The deposit, 15 feet thick, rested partly on solid rock and partly on rounded 

 masses of rock closely compacted together. 123 



X. MAINE 



The northeastern part of Maine is studded with lakes, which are due to the 

 last glacial invasion. Many of these lakes are, geologically, of very recent ori- 

 gin, dating from the Champlain submergence, and hence referable to Nipissing 

 time. Many of these lakes have extensive marl deposits of great thickness, 

 which contain an abundance of molluscan life. The deposits examined are all 

 in Aroostook County, and their biotic contents have been made known by Mr. 

 Olof O. Nylander. The mollusks, as listed by this gentleman, are indicated 

 below. Those sp cies not now living in these bodies qf water are marked with 

 an x. 

 Shells of Barren Brook bog, near Caribou, 124 



Anodonta fragilis 



Pisidium walkeri mainense 



Sphaerium simile 



x Vahata sincera? 



ii 



rhomboideum 



Physa heterostropha 



x Musculium secure 



x Ancylus parallelus 



x Pisidium adamsi 



Planorbis trivolvis 



» 



compressum 



x " campanulatus 



X 



contortum 



x " antrosus 



X 



pauperculum 



" parvus 



w 



rotundatum 



" species (near crista) 



X 



scutellatum? 



Galba obrussa 



it 



variabile 



Succinea obliqua 



it 



venlricosum 



Vertigo species 



'-' Amer. Journ. Sci., (i), XXVII, pp. 165-166, 1835. 

 m Thompson. Amer. Journ. Sci., (ii), LX, p. 256, 1850. 



123 Proc. Bost. Soc. Nat. Hist., TV, pp. 33-34, 1851. 



124 Nautilus, XIV, pp. 101-104. 



