INDEX TO VOLUME IV. 



Page numbers italicized indicate the most important entry under the heading. The numbers 

 with asterisks refer to text illustrations. Synonyms are in italics. 



ABDERITES, 417, 418, 438, 442, 



A 45i. 



altiramis, 452 



crasignathns, 439 



crassignathus, 438, 439, *44O 



crassiramis, 439 



meridionalis, 439, 442, 451 



serratus, 45 1 



tenuissimus, 452 

 Abderitidce, 416 



Abderitinae, 417, 438, 442, 443 

 Acdestis, 434, 452 



elatus, 452 



oweni, 452 



parvus, 453 

 Acmsea, 161 



heroldi, forma pygmaea, 161 

 Actaeon, 34, 243 



chilensis, 243, 257, 304 



semilaevis, 244, 258, 273, 294, 295 



semistriatus, 245, 294 



subscalatus, 244 



tornatilis, 244 



turgidus, 244, 304 

 Actaeonidae, 243 

 Acrobates pygmaeus, 336 

 Acrocyon, 445 



equianus, 445 



patagonensis, 445 



sectorius, 445 

 Acyon, 449 



bardus, 446 



tricuspidatus, 449 

 Acyonidce, 339 

 Africa, connection with Antarctica, 316 



443, Africa, South, 12 



Agassiz, A., 54, 56, 60 



L., 59, 60 

 Agustylus, 446 



bardus, 446, 447 

 carnifex, 446 

 cynoides, 446 

 primaevus, 446 

 Allen, J. A., 334 

 Amathusia, 134, 135 



angulata, .134, 257, 262, 266, 268, 270, 



271, 282, 283, 298 



Ameghino, F., 7, 79, 103, 104, 262, 265, 266, 

 267, 268, 269, 270, 271, 273, 274, 275, 

 276, 279, 280, 282, 284, 285, 287, 288, 

 303, 308, 309, 333, 334, 335, 339, 343, 

 348, 352, 378, 407, 408, 412, 416, 418, 

 419, 426, 429, 430, 431, 434, 435, 436, 



437, 439. 442, 443> 444 

 America, North, 333, 444 

 South, ii, 333, 339 



connection of, with Antarctica, 314 



with Australia, 444 

 Cretaceous of, 6 



Ammonite beds, sec Belgrano beds 

 Ammonites cleon, 36 



clypeiformis, 37, 38 

 leopoldinus, 37 

 sp., 8 

 telinga, 37 

 Ammonites, 7, 9, 10 

 Patagonian, 38 



Amphiproviverra, 340, 343, 344, 345, 346, 

 356, 363, 365, 370, 376, 378, 

 385, 394, 407, 408, 412 

 461 



