CONTElsrTS. 



PAGE. 



WooLMAN, Lewis. Geology of Artesian Wells at Atlantic City, N. T. (Concluded.) 145 



Sharp, Benjamin, M. D. Variations in Bulimus exilis 148 



Sharp, Benjamin, M. D. Remarks on the exuviae of snakes. .... 149 



Keyes, Charles R. Synopsis of American Carbonic Calyptrteidse. (Plate II.) . 150 



Leidy, Joseph, M. D. Hippotherium and Rhinoceros from Florida. . . . 182 



Leidy, Joseph, M. D. Mastodon and Capybara of South Carolina. . . . 184 



PiLSBRY, H. A. New East Indian Land Shells. 186 



Ford, John. Description of a New Species of Helix 188 



WoOLMAN, Lewis. Marine and Fresh-Water Diatoms and Sponge-spicules from the 



Delaware River Clays of Philadelphia. ........ 189 



Heilprin, Angelo. Mexican Explorations 191 



Rex, Geo. A., M. D. Descriptions of three new species of Myxomycetes, with notes 



on other forms in Century XXV of Ellis & Everhart's North American Fungi. . 192 



Brown, Arthur Erwin. On a new genus of Colubridae from Florida. . . . 199 



Stone, Witmer. On Birds Collected in Yucatan and Southern Mexico. . . . 201 



Ellis, J. B. and B. J. Everhart. New North American Fungi 219 



Heilprin, Angelo. Barometric Observations among the High Volcanoes of Mexico, 



with a consideration of the Culminating Point of the North American Continent. 251 

 Meehan, Thomas. Contributions to the Life-Histories of Plants, No. V. On the 

 Anthers of Lappa major. The Pollination of Crucianella stylosa. Note on 

 Unisexuality in Connection with the Order of Flowering Plants. On the varying 

 Character and Dichogamy in Flowers of Corylus Avellana. Dioecism in Labiatee. 

 Self-fertilizing Flowers. On the Male and Hermaphrodite Flowers of .^sculus 

 parviflora. On the Direction of Spiral Twist in the Leaves of the Norway 



Spruce 266. 



Leidy, Joseph, M. D. Remarks on Ticks •. 278 



Leidy, Joseph, M. D. Parasites of Mola rotunda 281 



Pilsbry, H. a. On Helix albolabris var. maritima 282 



Hartman, W. D., M. D. Description of New Species of Shells. (Plate III). . 284 



Sharp, Benjamin, M. D. An Account of the Vincelonian Volcano. (Plate IV). . 289 



Pilsbry, H. A. New and little-known American Moilusca, No. 3. (Plate V). . 296 

 Heilprin, Angelo. The Corals and Coral Reefs of the Western Waters of the Gulf 



of Mexico. (Plates VI and VII) 303 



Ives, J. E. Echinoderms from the Northern Coast of Yucatan and the harbor of 



Vera Cruz. (Plate VIII) 317 



