1869.] MEETING OP THE AMERICAN ASSOCIATION. 323 



of which he described in November h\st as Eqmis Parvidus. 

 Although it was a full grown animal, it was not more than two 

 and one-half feet high. It was by fiir the smallest horse ever dis- 

 covered. Of the other kind of fossil horses one was a three-toed 

 horse of the Hipparion type. Including the above the number 

 of species of fossil horses discovered in this country was seven- 

 teen, although the horse was supposed to be a native only of the 

 old world, and was first introduced here by the Spaniards. Of 

 the other remains there were two carnivorous animals, one about 

 the size of a lynx and the other considerably larger than a lion — 

 the last twice as large as any extinct carnivore yet discovered in this 

 country. Among the ruminants found in this locality was one 

 with a double metatarsal bone, a peculiar type, only seen in the 

 living aquatic musk deer and in the extinct Anoplotherium. 

 There were also the remains of an animal like the hog, a large 

 rhinoceros, and two kinds of turtles. These, together forming 

 .fifteen species of animals, and representing eleven genera, were 

 all found in a space ten feet in diameter and six or eight feet in 

 depth. It is supposed that the locality was once the margin of a 

 great lake, and that the animals sunk in the mire when they went 

 down to the water to drink. 



At the close of Professor Marsh's address, Professor Agassiz 

 made a few interesting remarks on the possibility of determin- 

 ing genuine afl&nities from fragmentary fossil remains, after 

 which he read a paper on the Homologies of the Palaechinidae, 

 •partially prepared by his son, Alexander E. R. Agassiz. 



ON THE GEOLOGY OF THE COAST OF MAINE. 



By Prof. S. W. Johnson. 



In this paper an account was given of the geology of that part 

 of the coast of the State of Maine between the mouths of the 

 Kennebec and Penobscot rivers. The coast of Maine, the author 

 stated, may be called a coast of denudation, and takes its present 

 conformation from the rocks underlying the soil, the waves of the 

 Atlantic having long since removed everything that is movable. 

 The rocks of this region are metamorphic, and lie in immense 

 folds, nearly parallel with each of the rivers, Kennebec, Sheepscot, 

 and others further east, occupying the synclinal axes between the 

 folds. Most of the islands lying ofi" this coast are only continua- 

 tions of the promontories constituting these folds. Monhegan is 



