840 



CAMBRIAN BRACHIOPODA. 



Liiigulella linnarssoni — Continued. 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PI. SXX, fig. 14 



"longovalis," discussed 536 



figured ■ 536 



manticula, described : 517 



compared witb Liiigulella arguta 478 



Lingulella clarkei 485 



Lingulella desiderata 492 



Lingulella granviUensis 504 



Lingulella ora 522 



Lingulella similis 533 



Obolus rotundatus 411 



general geographic and stratigraphic distribution 



tabulated 102 



grouped on the basis of the outline of the ventral valve. 470 



type specimen figured PI. XX, fig. Ic 



visceral area (splanchnocoele) characterized 470 



martinensis, described .' 518 



compared vfiih. Lingulella fenuginea 498 



Lingulella tumida 537 



general geographic and stratigraphic distribution 



tabulated 102 



outhne of ventral valve characterized 470 



type specimen figured PI. XXXVIII, fig. la 



minor, described 519 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PI. XXXVII, fig. 3 



mosia, described 520 



compared with Lingulella mosia osceola 521 



Lingulella f signata 532 



Lingulella winona '. 540 



Lingulella winoTia convexa 540 



general geographic and stratigraphic distribution 



tabulated 102 



grouped on the basis of the outline of the ventral valve. 470 

 type specimen not figured. 



mosia osceola, described 521 



compared with Lingulella kiurensis 512 



Lingulella rdndomensis 530 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PI. XVIII, fig. 2 



nannx), described 521 



general geographic and stratigraphic distribution 



tabulated 102 



grouped on the basis of the outline of the ventral valve. 470 



surface ornamentation characterized 470 



type specimen figured PI. XXIV, fig. la 



nathorsti, described 521 



compared with Lingulella acutan^ula 473 



Lingulella heberti 506 



Obolus ? sp. undt. f 423 



cardinal area discussed 304 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen not figured. 



nicliolsoni, described 522 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured Pi. XXX, fig. 3 



ora, described 522 



compared with Lingulella upis 538 



Lingulella wanniecki 539 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PI. XXXV, fig. 9 



oweni, described 523 



compared with Lingulella wanniecki 539 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured , PI. XVIII, fig. 5b 



visceral area (splanchnocoele) characterized 470 



"? pa^^/orm^5," compared with Lingulella 473 



peTattenuata, described 523 



compared with Lingulella cuneola 488 



Lingulella mosia osceola 521 



Lingulella similis 533 



Lingulella perattenuaia— Continued. 



compared with Lingulella (Lingulepis) acuminata 



meeki 550 



Obolus (Wcstonia) ella 456 



general geographic and stratigraphic distribution tab- 

 ulated 102 



generic and varietal referenqe of form referred to from 



Texas, discussed 550 



grouped on the basis of the outline of the ventral valve. 470 



type specimen figured PI. XXI, fig. lb 



visceral area (splanchnoccele) characterized 470 



phaon, described 525 



compared -with Lingulella cuneola 488 



general geographic and stratigraphic distribution tab- 

 ulated 102 



outline of ventral valve characterized 470 



type specimen figured PL XXVI, fig. Ic 



"pinTiaformis," mentioned ' 548 



pogonipensis, described 525 



corn-pared with Lingulella isse 510 



general geographic and stratigrapliic distribution tab- 

 ulated 102 



type specimen figured PL XX, fig. 3 



prinm, described 526 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen not figured. 



? primseva, described 527 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PL XXXI, fig. 5a 



punctata, described 528 



compared with Lingulella arguta 479 



Lingulella manticula 517 



discussed 517 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PL XX, fig. 9 



visceral area (splanchnocoele) characterized 470 



quadrilateralis, described 528 



general geographic and stratigraphic distribution tab- 

 ulated "102 



type specimen figured PL XXXIX, fig. 6 



Tadula, described 529 



compared with Lingulella bellula 482 



Lingulella ferruginea 498 



Lingulella ino 507 



Lingulella martinen^is 518 



Lingulella nathorsti 521 



Obolus cyane 389 



Obolus fragilis 393 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PL XLV, fig. Id 



visceral area (splanchnoccele) characterized 470 



radula aspera, discussed 529 



randomensis , described 530 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figiu-ed. . . ' PL XXI, fig. 5 



rotunda, described 530 



compared with Lingulella desiderata 492 



Lingulella ellsi 495 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen not figured. 



schucherti, described 530 



cardinal area discussed 304 



compared with L ingulella acutangula 472 



general geographic and stratigraphic distribution tab- 

 ulated 102 



generic reference discussed 472 



oldest species of genus 531 



type specimen figured PL XXI, fig. 6 



siemiradzkii, described 531 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PI. XXXI, fig. 2 



signata, described 532 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PL XXX, fig. II 



