792 



NEW YOUK STATE MUSEUM 



Didyiuograptus suecicus, 678, 679. 

 (Goniograptus) thureaui, 621. 

 tornquisti sp. nov., 506, 530, 573, 667, 

 688. 

 explanation of plate, 772. 

 Dimorphograptus, 475, 478, 526, 547. 

 Diplogi-apsus, 470. 

 antennarius, 731. 

 folium. 710. 

 Diplograptidae, 489, 499, 514, 517, 518, 

 538, 539, 544, 545, 547, 550, 551, 570, 571, 

 572, 574, 718-29. 

 Diplograptidi, 546. 



Diplograptus, 468, 474, 476, 478, 479, 483, 

 486, 488, 499, 508, 510, 511, 513, 518, 

 519, 521, 522. 525, 529, 538, 539, 540, 

 542, 545, 547, 550, 551, 552, 570, 572, 

 574, 577, 579, 718-19, 731. 

 sp., 744. 



figures, 520, 529. 

 sp. nov., 722, following p.503. 

 amplexicaulis, 491, following p.503. 

 angustifolius, folloicing p.503. 

 appendiculatus, 535, 723. 

 cancellatus, 612. 



dentatus, 499, 500, 503, 506-7, 539, 550, 

 552, 557, 574, 580, 581, 586, 587, 589, 

 608, 609, 610, 611, 612, 626, 632, 636, 

 637, 646, 664, 665, 672, 678, 680, 685, 

 687, 689, 690, 693. 695, 698, 699, 700, 

 712, 713, 715, 716, 718, 719-21, 723, 

 725, 726, 728-29, 730. 731, 732, 734, 

 745, 746, 778, following p.503. 

 explanation of plate, 782. 

 figure, 720. 



zone, 498-500, 504, 506, 508, 722. 

 foliaceus, 478, 479, 525, 526, 528, 542, 

 follomng p.503. 

 figures, 528. 



Diplograptus inutilis, 506-7, 574, 718, 

 721. 

 explanation of plate, 779. 

 laxus sp. nov., 499, 500, 506-7, 519, 574, 

 718, 722-23. 

 explanation of plate, 779. 

 longicaudatus sp. nov., 506-7, 574, 718, 

 723. 

 explanation of plate, 779. 

 physophora, 514, 519. 

 pristiniformis, 719. 

 (dentatus), 637. 

 pristis, 542, follon-ing p.503. 

 pusillus, folloicing p.503. 

 putillus, 722. 



quadrimucronatus. folloiovng p.503. 

 sertularioideus, 723. 

 teretiusculus, 723. 

 vesiculosus, 519, 723. 

 whitfieldi, 477, 520. 

 Diprion, 718. 



Diprionidae, 475, 544, 545. 

 Diprionidian, 484. 

 Discograptus schmidti, 596. 

 Disk, central, 487. 

 Dorsal edge of canal, 486. 

 Dorsal wall, 486. 



Dumfriesshire, black shales of, 470. 

 Dun, W. S., cited, 743. 



EUergill beds, 633, 720, 725, 726, 729, 730, 

 734, following p.503. See also Skiddaw 

 slates. 



Elles, G. L., cited, 459, 465, 471, 478, 484, 

 485, 495, 502, 525, 535, 536, 549, 550, 554. 

 555, 556, 558, 563, 616, 617, 618, 631, 633, 

 634, 637, 638, 639, 640, 641, 643. 644. 648, 

 653, 661, 667, 673, 675, 676, 687, 690, 695, 

 696, 699, 706, 708, 709, 711, 713, 715, 717, 



