INDEX. 



851 



Oholella cf. chromatica von Toll, discussed 592 



"circe," type of Quebecia 610 



mentioned 610, 611 



crfwsa, described 592 



com.ifavedvr\th Acrothelebdlula 637 



JBicia 568 



Botsfordia 602 



Oholella asiatica 589 



Obolella chromatica 591 



Oholella crassa elongata 595 



Obolella mobergi 597 . 598 



Obolella vcrmilioncnsis 598 



Obolella wirrialpen^is 599 



Obohis ? zoppi 422 



discussed 587 



general geograpliic and stratigraphic distribution 



tabulated 104 



sbell section figured text fig. 14, 299 



type specimen not figured. 



crassa elongata, described : . 595 



compared -with Obolella gwomi 596 



general geograpliic and stratigraphic distribution 



tabulated 104 



type specimen figured PI. LV, fig. 5 



'^gemma,^' type of Bicia 569 



groomi, described 595 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured text fig. 52,596 



"ida" discussed ^ 563 



f lindsiTOmi, described 596 



compared with Obolella chromatica 591 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured PI. LV, fig. 4 



"maculata Delgado," discussed 599, 660 



minor, described 596 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured PI. LIV, fig. 3a 



mobergi, described 597 



compared with Obolella crassa 594 



Obolella 9 Undstromi 596 



general geographic and stratigraphic distribution 



tabulated 104 



15^)6 specimen figured PI. LV, fig. 3c 



^'nitida," discussed 527 



plumbca, compared with Obolus? bavaricus 386 



"pretiosa," discussed 705 



"sabrinse," discussed 703 



"salteri" type of Obolus {Broggeria) 377,424 



vermilionensis , described 598 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured text fig. 53A,598 



wirrialpensls , described 599 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen figured PI. LV, fig. 7b 



wirrialpensls calceoloides, discussed 599 



"sp. Bornemann,'' generic and specific reference discussed. . 403 



sp. undt. , described 599 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen not figured. 



Obolella (Glyptias), described 599 



classification of. 321, 324 



compared with Obolella 587 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 104 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of 110 



number of species of, in different types of sediment ... 160 



surface ornamentation discussed 301 



type species Lingula 9 favosa 599 



favosa, described 600 



compared vrith Obolella mobergi 597 



general geographic and stratigraphic distribution 



tabulated 104 



type specimen not figured. 



" Obolella (Lingulella) prima," discussed 527 



OboleUidffi, classification of 321,324 



distribution in Cambrian strata 316 



genera and species referred to, described 586-611 



general stratigraphic distribution and number of Cambrian 



genera and species of 112 



number of Cambrian genera and species of 112 



number of genera and species in monograph 113 



Oboli, evolution of, according to Matthew, discussed 319 



Obolidee, classification of 321, 322 



distribution in Cambrian strata 315, 316 



genera and species referred to, described 370-578 



general stratigraphic distribution and number of Cambrian 



genera and species of 112 



number of Cambrian genera and species of 112 



number of genera and species in monograph 113 



number of Ordovician genera and species included in mono- 

 graph 113 



septa discussed 10 



species referred to described 370-578 



surface ornamentation discussed 301 



Obolinae, classification of 321,322 



genera and species referred to, described 370-561 



06oZws, described 370 



cardinal area discussed 304 



classification of 310, 321, 323 



compared with Acrothele 631, 632 



Acrothyra 716 



AcrotreUi 673 



A crotrcta argenta 673, 674 



Bicia 569, 570 



Bicia gemma 570 



Botsfordia 601 



cxlata 604 



granulata 606 



Curticia 318, 369, 370 



Dearbornia 614 



Dicellomus 312, 572 



JSlkania 561, 562, 563 



EJkania and Obolus ( Fordinia) 426 



Blkania desiderata 563 



'* Euobolus" 378 



Helmersenia 367, 368 



Keyserlingia bibchi 629 



Kutorgina 582 



" Lakhmin^ linguloides" 566 



Lingula 373-376 



Lingulella 376, 471, 472 



Lingulella by Matthew 471 



Lingulella acutangula 471, 475 



Lingulella prima 527 



Lingulella radula 529 



Lingulella (Leptembolon) .■ 541, 542 



Lingulella (Lingulepis) 544, 545 



Lingulella (Lingulepis) acuminata 547 



Lingulella (Lingulepis) exigua 553 



Linnarssonella 312 



Linnarssonella girtyi 666 



Linnarssonella tennesseensis 670 



Monobolina 378, 410 



Neobolus 564, 565 



Neobolus warthi 566, 567 



Nisusia festinata 728 



Obolella 312, 376, 587, 588, 592 



Obolus (Broggeria) 424' 



Obolus ( Fordinia) bellulus 428, 429 



Obolus ( Fordinia) perfectus 430 



Obolus (Lingulobolus) 430, 431, 433, 434 



Obolus (Lingulobolus) spissus 433, 434 



Obolus ( Westonia) escasoni 460 



Eustellaf major by Matthew 328 



Siphonotreta unguiculata 625 



Trematobolus 313, 616 



Trematobolus insignis 618 



Trematobolus kempanum 620 



Trematobolus pristinus 621 



criteria of subgenera 376 



development of 309 



evolution discussed 318 



evolution of - — 317 



