798 



NEW YOUK STATE MUSEUM 



Oesel, Dictjonema zone, 492; graptolite 

 fauna, following p.503. 



Ohio valley, graptolite fauna, folloicing 

 p.503; upper Maquoketa shales, follow- 

 ing p.503. 



Orleans island, graptolite fauna, 589, 651. 



Orthoceras limestone, 495, 498, 660. 



Orthoceratites, 467. 



Palaeozoicum, 736. 



Paterula, 739. 



Pauciramous forms, 484. 



Periderm, 486 ; histology of, 477. 



Perisarc, 486. 



Perner, J., cited, 459, 464, 471, 477, 480, 



498, 540, 541, 660, 691, 692. 

 Phycograptus, 717. 

 Phyllograpta sp., 599. 

 Phyllograptidae, 530, 545, 546, 547, 550, 



563, 564, 567, 571, 573-74, 703-18. 

 Phyllograptini, 546. 



Phyllograptus, 476, 480, 494, 497, 499, 508, 

 509, 530, 537, 545, 546, 547, 571, 573, 

 636, 703-6, 743, 746, following p.503. 

 angustifolius, 495, 497, 499, 506-7, 547- 

 48, 555, 563, 564, 573, 705, 706, 708, 

 711-14, 715, 744. 

 explanation of plate, 778. 

 figures, 704, 713. 

 anna, 497, 498, 506-7, 563, 564, 573, 651, 

 654, 669, 670, 678, 683, 703, 706, 

 714-16, following p.503. 

 explanation of plate, 777-78. 

 figures, 715. 

 zone, 490, 496-98, 505, 507, 651, 656, 



678, 690. 

 mut. pygmaeus, 547, 716. 

 nmt. ultimus, 715, 778. 



Phyllograptus densus, 679. 

 folium var. typus, 708. 

 ilicifolius, 480, 497, 506-7, 540, 563, 564, 

 573, 648, 069, 705, 706-8, 711, 712, 

 713, 714, 715, 716. 

 explanation of plate, 777. 

 figures, 707. 



var. grandis, 706, 707, 708. 

 similis, 658, 660. 

 Stella, 693, 695. 



typus, 494, 497, 498, 506-7, 563, 564, 573, 

 580, 586, 608, 653, 654, 706, 708-11, 

 720, 744, 745, follotcing p.503. 

 explanation of plate, 778. 

 zone, 496-98, 6tl, 713. 

 Phyllograptus shale, 505, 507, 651, 680, 



670, 673, 676, 681, 691. 

 Phyllograptus zone, 720. 

 Phyllo-Tetragraptus beds, 669, 679. 

 Phylogeny of the graptolites, 478; of 

 orders of graptolites, 548-53 ; of genera 

 and species of graptolites, 553-67; of 

 Dichograptidae, 553, 554. 

 Plates, explanation of, 747-83. 

 Pleurograptus, 537, 544, 566, 571, 701. 



linearis, following p.503. 

 Plumularia, 467, 468, 588. 

 Plumularidae, 474, 521, 575, 577. 

 Pneumatocyst, 488. 

 Pneumatophor, 518, 519. 

 Point Levis, graptolite fauna, 467, 491, 

 503, 505, 507, 580, 581, 583, 587, 588, 589, 

 590, 606, 609, 611, 622, 623, 632, 633, 636, 

 646, 656, 659, 669, 672, 675, 689, 690, 710, 

 713, 715, 721, 728, 729, 731, 734, 738, 739, 

 740, 741, 742, 745; Caryocaris from, 737. 

 Point Levis zone, 495, 651, 656, 660, 675, 

 710, 720, follomng p.503. 



