INDEX TO GRAFrOLITES OF NEW YORK, PART 1 



789 



Desmograptus, 508, 571, 573, 599, 609; 

 phylogenetic relations of genera, 553. 

 caneellatus, 504-5, 573, 609, 610-11. 

 explanation of plate, 752. 

 figure, 610. 

 devonicus, 599. 



intricatus sp. nov., 504-5, 573, 599, 609, 

 611-12. 

 explanation of plate, 752. 

 figures, 609, 611, 612. 

 macrodictyum, 610, 611. 

 Dlcellocephalus fauna, 493. 

 Dicellograptus, 474, 544, 546, 552, 553, 666. 

 anceps, following p.503. 

 complanatus, following p.503. 

 divaricatus var. rigida, 514. 

 moflfatensis, 552. 

 Dicellograptus zone, lower, following 



p.503; upper, follounng p.503. 

 Dichograpsus aranea, 634, 637. 

 octobrachiatus, 635. 

 sedgewickii, 637. 

 Dichograptid, 522; figure showing sicula, 



520. 

 Dichograptidae, 468, 475, 476, 478, 483, 

 486, 487, 489, 494, 497, 499, 515, 517, 525, 

 527, 528, 529, 530, 531, 532, 535, 536, 538, 

 544, 545, 546, 547, 548, 549, 550, 551, 554, 

 555, 563, 564, 567, 571, 573, 604, 612-701; 

 phylogeny of, 553, 554 ; supposed causes 

 of evolution, 542, 567-70. 

 Dichograptidi, 546. 



Dichograptus, 470, 473, 508, 516, 531, 535, 

 537, 544, 554, 563, 566, 567, 568, 571, 

 573. 620, 630, 634, 637, following 

 p.503. 

 sp. figure 541. 

 hexabrachiatus, 637. 



Dichograptus kjerulfi, 631, 633. 

 logani, 631, 632. 



octobrachiatus, 494, 495, 497, 504-5, 542, 

 556, 573, 585, 630, 633, 634^37, 669, 

 683, 686, 744, 746. 

 explanation of plates, 762, 764. 

 et hexabrachiatus, 635. 

 octonarius, 556, 634, 744. 

 separatus, 559, 634. 



(Clonograptus, Goniograptus) thureaui, 

 621. 

 Dichograptus beds, 495, 636. 

 Dichograptus zone, follomng p.503. 

 Dichotomous branching, 485. 

 Dicranograptidae, 544, 

 Dicranograptus, 474, 544, 546, 553. 



clingani, follovAng p.503. 

 Dictyograptus, 599. 

 n. sp., 608. 



( Desmograptus) caneellatus, 610, 611. 

 fiabelliformis, 600. 

 Dictyonema, 467, 469, 476, 477, 478, 495, 

 503, 508, 509, 513, 527, 535, 536, 537, 

 544, 546, 549, 556, 563, 571, 573, 578, 

 579, 584, 591-99, 604, 743; mode of 

 life, 593; phylogenetic relations of 

 genera, 553. 

 (Desmograptus) sp. nov., 606, 607, 611. 

 blairi, 488. 



(Desmograptus) cancellatum, 610. 

 cavernosum, 594, 596, 598, 604, 607. 



figures, 595, 597. 

 cervicorne, 607. 



figure, 592. 

 delicatulum, 607, 608. 

 flabelliforme, 478, 479, 504-5, 515, 521, 

 526, 527, 535, 549, 563, 567, 573, 586, 

 592, 593, 594, 595, 597, 598, 699-606, 

 614, 615, follotcing p.503. 



