■838 



CAMBRIAN BEACHIOPODA. 



Lingulella atava, described 479 



compared with JjiTif/iiZeZZa aiauo iTWuZa? 480 



Lingulella cania 485 



collicia 486 



flumenis 501 



torrentis 535, 536 



confused with Lingulella (Lingulepis) gregwa 479, 4S0 



general geographic and stratigraphic distribution tabu- 

 lated -- 101 



tjTpe specimen figured PI. XXXV, flg. 5 



atava insula:, described 480 



general geographic and stratigraphic distribution tabu- 

 lated 101 



type specimen figured PI. XXXV, fig. 8 



auga, described 480 



general geographic and stratigraphic distribution tabu- 

 lated 101 



grouped on the basis ol the outline of the ventral 



valve 470 



surface ornamentation characterized 470 



type specimen figured PL XXIV, flg. 6b 



bella, described 481 



compared with Lingulella arguta 479 



Lingulella billingsiana 483 



Lingulella kiurems 511-512 



Lingulella lens 513 



Lingulella lepis 514 



general geographic and stratigraphic distribution tabu- 

 lated.. 102 



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



species confused with 481, 482, 487, 513 



type specimen flgured PI. XIX, flg. 2h 



bellula, described 482 



compared with Lingulella arguta 479. 



Lingulella Ullingsiana 483 



Lingulella prima 527 



Obolus rejulgens 410 



general geographic and stratigraphic distribution tabu- 

 lated 102 



type specimen figured PL XIX, fig. la 



Ullingsiana, described 483 



compared with Limjulella ampla 478 



Lingulella bellula 482 



general geographic and straligraphic distribution tab- 

 ulated 102 



type specimen flgured PL XXIX, flg. 3a« 



bornemanni, described 483 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PL XXX, flg. 18 



buttsi, described 484 



general geographic and stratigraphic distribution . 



tabulated 102 



type specimen flgured PL XXIX, flg. 4 



"cxlata," discussed C04 



cania, described 484 



compared with Lingulella atava 480 



Lingulella atava iTisulse 480 



Lingulella manticula 518 



Lingulella ora 522 



Lingulella upis 53S 



confused with Lingulella (Lingulcpis) gregwn 485 



general geographic and stratigraphic distribution 



tabulated 102 



reference to Leptobolus suggested 472 



type specimen figured PL XXXV, fig. 3 



cedefis, described 485 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured PL XXX, flg. 8 



clarkei, described 485 



general geographic and stratigraphic distribution 



tabulated 102 



type specimen figured tsxt fig. 42B 486 



collicia, described 486 



compared with Lingulella atava 480 



Lingulella cania 485 



Lingulella flumenis 501 



Lingulella ora 522 



Lingulella upis 538 



collicia — Continued, 

 general geographic and stratigraphic distribution 



tabulated 102 



type specimen flgured PI. XXXV, fig. 1 



" collicia collis,'^ compared with Lingulella collicia 486 



concinna, described 486 



compared with Lingula 319 



Lingulella bella 482 



Lingulella lens 513 



Obolus acadicus 380 



confused with Lingulella bella 481, 482, 487 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PI. XXXIII, fig. 2d 



" ? cuneata," discussed 503 



cuneola, described 4S8 



compared with Lingulella acutangula 476 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen figured PI, XXVII, fig. 7 



damesi, described 489 



compared with Obolus chinensis 387 



Obolus prindlei 409 



general geographic and stratigraphic distribution tab- 

 ulated 102 



generic reference changed 489 



type specimen figured PL XXXIX, flg. 8a 



davidsoni, described 489 



general geographic and stratigraphic distribution tab- 

 ulated , 102 



type specimen flgured PI. XXXII, fig. 1 



davisi, described 489 



compared with Lingula ■ 319 



Lingulella bella 482 



Lingulella cedens 485 



Lingulella heberti 506 



Lingulella kiurensis 512 



Lingulella wirthi 541 



Lingulella, {Lin^gulepis) exigua 552, 553 



Obolus prindlei 379 



Obolus (Sckmidtia) celatus -• 472 



Obolus (Westonia) ella 456 



general geographic and stratigraphic distribution tab- 

 ulated 102 



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

 type specimen not flgured. 



"cL davisi," mentioned 499 



"cL davisii Kayser," discussed 490 



delgadoi, described 491 



discussed 560 



general geographic and stratigraphic distribution tab- 

 ulated 102 



generic reference mentioned 473 



type specimen figured PI, XXIX, flg. 6 



desiderata, described 492 



compared with Lingulella manticula 517 



Lingulella similis 533 



Lingulella wanniccki 539 



Obolus prindlei 409 



general geographic and stratigraphic distribution tab- 

 ulated 102 



stratigraphic distribution and possible specific differ- 

 ences in, mentioned 473 



type specimen flgured PL XX, flg. 4 



dubia, described 494 



confused with Obolus (Westonia) ella 495 



general geographic and stratigraphic distribution tab- 

 ulated 102 



platform mentioned 310 



type specimen flgured PL XXIV, flg. 4 



ellsi, described 495 



general geographic and stratigraphic distribution tab- 

 ulated 102 



type specimen flgured PL XIX, flg. 3 



ferruginea, described 496 



compared with Lingulella bellula 482 



Lingulella buttsi 484 



Lingulella delgadoi 491 



Lingulella desiderata 492 



Lingulella ellsi 495 



