INDEX TO GRAPTOLITES OF NEW YORK, PART 1 



789 



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

 pbylogenetic relations of genera, 553. 

 cancellatus, 504-5, 573, G09, 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. 

 macrodictj'um, 610, 611. 

 Dicellocephalus fauna, 493. 

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

 anceps, following p.503. 

 complanatus, following p.503. 

 divaricatus var. rigida, 514. 

 mofifatensis, 552. 

 Dicellograptus zone, lower, following 



p.503; upper, follotcing 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. 



Diehograptus kjerulfl, 631, 633. 

 logani, 631, 632. 



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

 556, 573, 5S5, 630, 633, 634^37, 669, 

 683, 686, 744, 746. 

 explanation of plates, 762, 764. 

 et hexabrachiatus, 635. 

 octonarius, 556, 634, 744. 

 separatus, 559, 634. 



(Glonograptus, Goniograptus) thureaui, 

 621. 

 Diehograptus beds, 495, 636. 

 Diehograptus zone, following p.503. 

 Dichotomous branching, 485. 

 Dicranograptidae, 544, 

 Dicranograptus, 474, 544, 546, 553. 



clingani, following p.503. 

 Dictyograptus, 599. 

 n. sp., 608. 



(Desmograptus) cancellatus, 610, 611. 

 flabelliformis, 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; pbylogenetic 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, 599-606, 

 614, 615, following p.503. 



