Index 



Matthew, W. D., and Cook, H. J., 

 cited, 532. 



Melville, W. H., quoted, 349. 



Meretrix (Callista) piitsburgensis, 146. 



Merriam, J. C, 437a; cited, 11; ac- 

 knowledgment, 56; quoted, 59. 



Merychippus, sp., 449, 450, 452, 474, 

 479, 480, 505; upper cheek-teeth, 

 480; lower cheek-teeth, 480, 486; 

 incisors and canines, 487; milk 

 dentition, 490; skull, 494; limbs, 

 500; table of comparative mea- 

 surements of dentition, 489, 490; 

 figures of, 496, 499, 501, 502, 503; 

 measurements: of skull, 498; of 

 metapodial III, 502; relationship 

 to Hipparion, 558, 561; compari- 

 son of skeletal elements, 569, 570, 

 575. 



Merychippus, like calamarius in fig- 

 ure of reconstructed skull of, 495. 

 Merychippus calamarius stylodontus, 

 482, 505, 507; figures of, 482, 483, 

 485, 487, 488, 496, 497. 

 (Protohippus) intermontanus, 480, 

 505, 506; figures of, 481, 482, 487, 

 491; milk dentition, 494. 

 isonesus, 492; figures of, 493. 

 sumani, 480, 482, 484, 486, 606 ; fig- 

 ures of, 483, 492. 

 Meryehyus, 532. 

 Merycochoerus, 532, 575, 578. 



( Pronomotherium ? ) calif ornicus, 

 575-578; figures of, 574, 576, 577. 

 proprius, 508, 576, 578. 

 rusticus, 508, 511. 

 Merycochoerus? buwaldi, 507-511, 

 576, 577; figures of, 509, 510; 

 measurements of, 511. 

 Merycodus, 451, 452, 585. 



sp., 517, 526, 532, 582; figures of, 

 518, 519. 



neeatus? 517-521, 582; figures of, 



517, 520, 521. 

 near neeatus, 582; figures of, 583, 



584. 

 osborni, 519. 

 Merycodus? coronatus, 521-524; fig- 

 ures of, 523. 

 Metamorphic rocks in Franciscan 



group, 5. 

 Metis, genus, 154. 



rostellata, 154; plate showing, opp. 

 204. 



Miopleiona, genus, 184. 



sp., 184; plate showing, opp. 232. 

 indurata, 56, 184, 185. 



Modiolus, 133. 

 gabbi, 134. 

 inflatus, 134. 



kirkerensis, 133, 134; plate show- 

 ing, opp. 204. 



multiradiatus, 134. 



pittsburgensis, 134; plate showing, 

 opp. 204. 



Mohave area, geographic situation 

 and physical conditions, 438; ex- 

 isting life, 439; mammal beds, 

 440; Tertiary formations, 444- 

 449; climate, 450, 526. 



Molengraaff, G. A. F., cited, 357, 380. 



Molopophorus, genus, 174. 



biplicatus, 174; plate showing, opp. 



226. 

 gabbi, 174. 



Molucca Islands, 15. 



Monterey formations, 81; areal map 

 of, opp. 78. 



Monterey Group, lithologic and faunal 

 zones of, 73; occurrence of bedded 

 cherts in, 278, 364, 374, 395, 408; 

 lithologic tyj>es in, 278; diatoma- 

 ceous earths and shales, 279; 

 "white shales," 281; cherts, 282, 

 292, 303; limestones, sandstones, 

 tuffs, 291. 



Monterey, Lower, lithology of, 79. 



Morse, H. W., and Pierce, G. W., cited, 

 398. 



Mulinia, genus, 159. 

 Mulinia? sp., 159. 



Mullion Island, radiolarian rocks of, 



319, 395. 

 Murex, genus, 176. 

 dalli, 176. 



(Ocinebra) sobrantensis, 176; plate 



showing, opp. 232. 

 topangensis, 176. 

 Muricidae, 176. 



Murray, Sir J., and Hjort, J., quoted, 

 382. 



Murray, Sir J., and Irvine, E., cited, 

 378, 382. 



Mustela? buwaldi, 542; figures of, 543. 

 Mya, genus, 160. 



abrupta, 161. 



californica, 161. 



(Cryptomya) incognita, 160; plates 



showing, opp. 208, 214. 

 (Cryptomya) oregonensis, 161. 

 Myacidae, 160. 

 Mytilidae, 133. 

 Mytilus, genus, 135. 



arnoldi, 135; plate showing, opp. 

 210. 



mathewsonii, 135. 

 (Mytiloeoncha) mathewsonii, 135; 

 plate showing, opp. 222. 



592] 



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