88 R. P. Stevens on Glacial Phenomena 
Adult shells consist of five or six turns. Last turn forms nearly 
half of the shell. Turns rounded. Suture impressed. Surface 
glossy. Color bluish black. 
Total length, 3°6™.; width, 2™. 
Anomphalus Meeki, n. sp., Fig. 2. 
small individuals. Outer lip thickened, slightly reflexed. 
Suture slightly impressed. Each turn including only about 
half of the preceding one, thus distinguishing the species from 
A. rotulus, the type of the genus. Imperforate, but last turn 
slightly excavated in the umbilical region. Last turn more 
than half of the shell. 
Total length, 3-2™.; width, 4™™. 
eee 
Art. XV.—On Glacial Phenomena in the vicinity of New York 
City; by R. P. Srevens, M.D. 
Tue evidences of a glacier once moving over the island of 
New York are of three classes: 1st, The grooves or strise, an 
other results of the abrasion of the rocks of the island, wherever 
they are visible. 2nd, The mantle of drift which partially con- 
ceals the rocks. 8rd, Facts observed over the hills of the 
neighboring island of Long Island. All the evidences of the 
first class show that the movement and agencies causing them 
proceeded from the northwest toward the southeast. J have 
made many examinations and measurements, from one end of 
the island to the other, and have never found any single 1- 
stance to the contrary. My observations have also extended 
to Staten Island, New Jersey, and northwestward to the Dela- 
ware river, and up the Hudson river on both shores—and_ also 
over on the Highlands and mountains separating New York 
State from the States of Connecticut and Mr 
N. 30° W., or S. 20° E. toS 380° E. Prof. Cooke, in his re- 
port on the Geological Survey of New Jersey, found ‘all his 
measurements on the Palisades west of the Hudson river and 
opposite New York to lie between N. 20° W. and N. 75° W- 
e glacier, then, moved from the N.W., as Prof. Dana has 
