t ONTENTS. 



PA.99 



MEMOIR OF JOHN BARCLAY, M.D., .... 17 



INTRODUCTION, 45 



THE OPOSSUMS, 75 



DIDELPHID^E, ib. 



Virginian Opossum, ..... .79 



A zard's Opossum. Plate I. . . . . 83 



Crab-eating Opossum, . 85 



Californian Opossum, . 87 



Short-headed Opossum, .... 88 



Quica Opossum, ...... ,90 



Surinam Opossum, . . .... 92 



Naked-tailed Opossum. Plate II 94 



Lord Derby's Opossum. Plate II.* .... 97 



Woolly Opossum, 98 



Thick-tailed Opossum, 100 



Philander Opossum, .102 



Cinereous Opossum, 10i 



Merian's Opossum, . . . 104 



M urine Opossum, . . . . .10* 



Elegant Opossum, . . . . . . . 106 



Three-striped Opossum. Plate III. ... 107 



Tricolored Opossum, . . . . . . . 109 



Short-tailed Opossum, 1W 



Didelphys Pusilla, 112 



The Yapock Opossum. Plate IV ib. 



