INDEX 



D09 



laqueatum, 439. 



lentum sp. nov., 433~34> 509, 5 T 2- 

 explanation of plate, 556. 

 figure, 433. 



marcoui, 426. 



maro, 448. 



missisquoi, 508, 511, 513. 

 modestum sp. nor., 436~37> 509, 5 12. 



explanation of plate, 552. 



figure, 436. 

 moniliforme, 487. 

 montrealense, 425. 

 montrealensis, 424. 

 multicameratum, 518, 519. 

 orclinatum, 419. 

 perannulatum, 448. 

 perseus, 508, 511, 512. 

 primigenia, 504. 



primigenium, 399, 408, 418, 504-5. 

 progressum sp. nor., 433, 434, 509, 

 512. 



explanation of plate, 552. 



figure, 434- 

 rectiannulatum, 506, 511, 512. 

 recticameratum, 437. 

 repens, 508, 511, 512. 

 richteri, 486. 

 sayi, 419, 508, 511, 513. 

 shumardi, 436, 437. 

 sordidum, 424. 



subarcuatum, 445, 448, 487, 488, 



518-19. 

 tenuiseptum, 408. 

 tityrus, 508, 511, 513. 

 vagum sp. nov., 433, 434, 435-36, 

 509, 512. 

 explanation of plates, 546, 554. 

 velox, 410, 412. 

 xerxes, 508, 511, 513. 

 Orthoceratida, 431-54, 509-10. 

 Orthoceratites, 493. 

 Orthochoanites, 431-86, 507, 509-10. 

 Orygoceras gen. nov., 449-50, 510. 

 cornu-oryx, 449, 450-51, 510, 512. 

 explanation of plate, 556. 

 figure, 451. 



Paleogeographic distribution of 



cephalopods, 514. 

 Paleoteuthis dunensis, 493. 



Paractinoceras, 489. 



canadense, 491. 

 Perkins, G. H., acknowledgments 



to, 394, 424; collections by, 396, 



473, 479, 490, 499, 501. 

 Philipsburg, Beekmantown formation, 



395 ; fauna, 474, 475. 508, 521, 525. 

 Phragmoceratidae, 501. 

 Piloceras, 429-30, 509, 513, 5 16, $17, 

 523, 524, 527- 



canadense, 519. 



explanator, 429-30, 509, 512. 

 explanation of plates, 548, 550. 



triton, 429. 

 Piloceratidae, 429-30, 509. 

 Plates, explanation of, 529-604. 

 Plattsburg, fauna, 503. 

 Plectoceras, 470, 482-83, 510, 513, 522, 

 523, 524, 526. 



halli, 483, 520. 



(Nautilus) jason, 454, 455, 483, 

 484-86, 510, 512, 518, 520. 

 explanation of plates, 576, 586, 



588, 590. 

 figures, 484, 4S5 

 PlectoceiLtida, 454-86, 510. 

 Plectoceratidae, 450, 470, 482-86, 510. 

 Point Le\H, fauna; 525. 

 Poughkeepsie, fauna, 518. 

 Previous investigations, statement of, 



395-96. 

 Primitia seelyi, 399. 

 Proterocameroceras brainerdi, see 

 Cameroceras (Proterocamero- 

 ceras) brainerdi. 

 Protobactrites, 432, 433. 

 Protocycloceras, 438-41, 440, 441, 510. 

 cf. furtivum, 445, 510, 512. 



explanation of plate, 560. 

 lamarcki, 440, 441-43, 510, 512, 518, 

 519, 525. 

 explanation of plates, 558, 560. 

 figures, 442, 443. 

 whitfieldi sp. nov., 44 r. 443 45, 440, 

 510. 512. 

 explanation of plate, 558. 

 figure, 444. 



Quebec, Beekmantown formation, 

 395; fauna. 520. 



