INDEX. 
Basalt canons, see Arroyo Gio 
Bayle, 1 1 
Bazin, 59 
Behrendsen, 7, 8, 9, 11, 17, 19, 26, 30, 35, 42 
Belgrano beds, 4, 5, 6, 12, 13, 14, 15, 16, 17, 
18, 20, 21, 23, 24, 25, 26, 27, 30, 31, 32, 
33, 34, 35, 39, 4C 42, 43 
Bensley, B. A., 334, 385, 407, 409,412,416, 
417, 420, 441 
Bettongia, 443 
Bettongiinae, 443 
Bibliography, 325, 458 
Bicego, Sr., 269 
Bivalves, 277 
Blanford, H. T., 61 
Bodenbender, 7, 19 
Boettger, O., 152 
Bonaparte, C. L., 339 
Bonarelli, 36 
Bor chert, 310 
Borhyaena, 334 >34-0, 342, 345, 346,347, 362, 
363- 365, 366, 367, 368, 369, 372 f 
377, 380, 381, 382, 383, 384, 396^ 
398, 400, 408, 412, 444 
excavata, 340, 347, 349, 35 7,360 
fera, 444, 445 
sanguinaria, 445 
tuberata, 340, 347, 349, 351 ,356, 360, 
365 
zitteli , 356 
Borhycenidce , 339 
Borsonia, 242, 322 
delucii, 243, 294 
patagonica, 242, 258, 267, 294, 295 
Bouchardia, 79 
tulipa, So 
zitteli, 7p, 257, 262, 268, 278 
Brachiopoda, 70 
Brazil, Cretaceous of, 6 
Brown, B., 386, 413, 415,421, 43 1 
Brunswick Peninsula, 7 
Bryozoa, 64 
Buccinidae, 208 
Buccinum, 208, 324 
(Cominella) annae, 208 , 258, 267, 293, 
295 
Buccinum* (Cominella) obesum, var. minor ; 
209, 258, 298 
obesum, 267 
obesum , 209 
veneris, 208, 293 
Bulla, 245 
chilensis, 245 
conoidea, 246 
glaphyra, 247, 294 
patagonica, 245,2^, 258, 262, 267, 277, 
283, 294, 295, 305 
remondi, 245, 246, 257, 304, 305 
striatissima, 246, 304 
triticum, 243 
Bullidae, 245 
Burtinella, 31 
Busk, G., 66, 67, 70 
zENOGzEA, 313 
Caenolestes, 334, 340, 416, 417, 418, 
419, 420, 42 1 , 422, 423, 427, 441, 442 
obscurus, 334 
Caenolestidae, 340, 412, 416, 419, 423, 438, 
44C 443 
Caenolestinae, 416, 417, 418, 427, 442 
Calliostoma, 164 
audebardi, 166, 292 
biangu latum, 292 
cossmanni, 166, 258, 267 
cyclus, 169, 292 
ditropis, 292 
fricki, 165, 304 
garetti, 168, 258, 267, 292, 295 
iheringi, 169 , 258, 267, 292, 296 
metrium, 169, 292 
observationis, 164, 16 5, 258, 273, 304 
peraratum, 163, 258, 263, 267, 292, 295, 
460 
philanthropus, 168, 292 
philippii, 164, 165, 257, 304, 460 
podolicum, 168, 292 
pseudoturricula, 168 
santacruzense, 167, 258, 263, 267, 292, 
295 
Callomenus, 417, 427, 434, 436, 437, 439, 
442, 454 
