794 



NEW YOKK STATE MUSEUM 



Goniograptus macer, 744. 



perflexilis sp. nov., 500, 504-5, 559, 561, 

 565, 573, 625-27, 644, 662-63, 681. 

 explanation of plate, 759, 760. 

 figures, 625, 626, 627. 

 mut.y 499. 

 thureaui, 478, 479, 503, 504-5, 526, 527, 

 531, 569, 573, 621-24, 626, 627, 

 631, 638, 652, 661, 744. 

 figures, 622. 

 var. postremus, 623. 

 var. nov., explanation of plate, 758-59. 

 var. selwyni, 621. ■ 

 Goniograptus subzone, following p. 503. 

 Gorgonia flabelliformis, 599. 

 Gothland, graptolite fauna, 592, 597, 602, 



607. 

 Gothograptus, 518, 547, 733. 

 Grabau, A.W.,discoverv of Pliyllograptus, 



499. 

 Granville, graptolite fauna, 595, 601; 



Dictyonema zone, 493. 

 Graptolite shales, 479, 695. 

 Graptolites, animal nature, 4G7; central or 

 basal portions of colonies, 473; classifi- 

 cation and phylogeny, 543-74 ; derived 

 from Bryograptus, 555 ; derived from 

 Clonograptus, 556; descriptions, 578- 

 734 ; some general facts of distribution, 

 500-3 ; Hall's views, 468 ; histology and 

 chemical composition of the periderm, 

 539-43 ; history of the study of, 466-78 ; 

 similarity to hydrozoans, 467; internal 

 structure, 472; methods of illustration, 

 481 ; methods of investigation and illus- 

 tration, 479-82 ; mode of existence, 469, 

 478, 509-19; mode of reproduction 

 and development, 477-78; mode of re- 

 production and ontogeny, 519-34; mode 



of suspension, 515 ; phylogeny of genera 



and species, 478, 553-67; phylogeny of 



orders, 548-53; range and geogi'aphit; 



distribution, 488-508; stratigraphic re- 

 lations, 469; structure and morphology, 



534-39; taxonomic relations, 574-77; 



term, 466; terminology, 482-88; vege- 

 table origin, 466. 

 Graptolites (Didymograpsus) bryonoides, 

 655. 



caduceus, 658, 693. 



extensus, 668. 



fruticosns, 649. 



gracilis, 679. 



logani, 631. 



octobrachiatus, 635. 



quadribrachiatus, 645. 



thureaui, 621. 

 Graptolithus, 466, 477, 574. 



bifidus, 689. 



bigsbyi, 658. 



bryonoides, 647, 655. 



caduceus, 697. 



constrictus, 668. 



divergens, 701. 



extensus, 668. 



flexilis, 618. 



fruticosus, 649. 



logani, 630, 631. 



milesi, 544, 617. 



multifasciatus, 544. 



nitidus, 671. 



octobrachiatus, 634, 635. 



patulus, 674. 



pristiniformis, 719. 



quadribrachiatus, 645. 



ramosus, 473. 



richardsoni, 544. 



slmilis, 660. 



