'W^ 



CONTKNTS. 



Cope, E. D. Notes on the Geographical Distribution of Batrachia and 



Reptilia of Western North America, 9, 10 



Skinner, H. Ovipositing of Argynnis cybele, 36 



MoHR, C^HARLES. On Quercus Durandii Buckley, 37 



TowNSEND, Chas. Hybrid Birds, 39 



Lewis, H. Carvill. On a Supposed Human Implement from the Gravel 



at Philadelphia 40 



Cresson, H. T. Note on a drilled Mall in the Haldeman Collection of 



Antiquities, ^ ............ 43 



Lewis, H. Carvill. Change of Color in a Katydid, . . . .44 



Leidy, Jos., M.D. On the Reproduction and Parasites of Anodonta 



fluviatilis, . . . . . . • \ • • • • .44 



Leidy, Jos., M.D. On Pediculus vestimenti, 46 



Heii.prin, Angelo and H. Carvill Lewis. The Ice of the Glacial Period, 46 



Lewis, H. Carvill. Chalcedony containing Liquid, .... 49 

 Meehan, Thos On the Flowering of the Stapelia, . . . . .49 



Cope, E. D. On a new extinct Genus of Sirenia, from South Carolina, . 52 



Cresson, H. T. Notes on Prehistoiic Copper Implements, ... 55 



Cope, E. D. The Tritubercular Type of Superior Molar Tooth, '. . 56 



Allen, Harrison, M.D. The Spinal Chord of Batrachia and Reptilia, 56 



Cope, E. D. On Dinodipsas and Causus, 57 



Wright, Berlin H. A new Unio from Florida ( Plate I), ... 58 



Townsend, Chas H. Notes on ihe Birds of Westmoreland County, Penna. 59 



Cope, E. D. Permian Fishes and Rei^tiles, ... ... 69 



Heii.prin, Angelo and H. Carvill Lewis. Phenomena of Glaciation, 69 



Lewis, H. Carvill. Crystallized Serpentine from Delawaie, ... 72 



Meehan, Thomas. Com ractiim of Vegetable Tissues under Frost, . 74 



Koenig, Geo. A. Note on a new Cold-Purple, 75 



Leidy, Jos., M.D. A Flint Nodule from the Greensand of New Jersey, 76 



Cope, E. D. On the Mutual Relations of the Bunotherian Mammalia, . 77 



Meehan, Thomas. Notes on Echinocacius, 84 



Meehan, Thomas On the Relations of Heat to the Sexes of Flowers, . 85 



Cresson, H. T. Aztec Music ( Plates II and III), 86 



Leidy, Jos., M.D. A Social Heliozoon, 95 



WiLLCOx, Jos. Canadian Notes, 96 



Cope, E. D. On the Characters of the Skull in Hadrosaurus (Plates I V-VH ), 97 



Cope, E. D. On some Vertebrata from the Permian of Illinois, . . 108 



Meehan, Thomas. Observations on Forsythia, Ill 



Meehan, Thomas. Influence of Circumstances on Heredity, . . .112 



UooPES, Josiah. Pinus Koraiensis Sieb. & Zucc. ..... 114 



Evkrmann, B. W. and Seth E. Meek. A review of the Species of Gerres 



found in American Waters, 116 



794 4 786 SANSOM 91 



