INDEX. 



837- 



Lincoln County, Nevada, localities in 7k, 



7n, 14in, 30, 31, 31a, 31u, 216a, 313g, 333, 333a, 333b 



Lindstrom, G. , species named for 596, 757 



lindstTomi, see BiUingsella and Oholella. 

 lineolata, see Lin^ulclla. 



Lingula, association mentioned 7SS 



classification 310 



compared -with Lingulella 370, 471, 472, 473 



Lingulella (Leptembolon) 541, 542 



Obolus 373-376 



development of platform in 309 



evolution discussed 319 



mentioned 297,386,407,471,482,508,512,532 



shell structure of, compared with that of Obolus 296 



vascular markings mentioned 311 



"acuminata," mentioned 386 



type of Lingulella ( LiTigulcpis) 474 



aTiatina, compared with. Lingulella acutangula 474 



compared with Lingulella (Leptembolon) lingulse- 



formis 543 



figured 374 



"antiqua," compared with Obolus belli 386 



"attenuata,^' compared with Lingulella 473 



compared with Lingulella bornemanni 483, 484 



Lingulella keberti ^ 506 



"aurora," typ^oi Obolus (IV estonia) 378.450 



of. bilUngsiana, discussed 503 



cincta, surface ornamentation discussed 301 



" ? corrugata" discussed 515 



"cuneata," compared with Lingulella acutangula 476 



"davisi," type of Lingulella 469 



" ? dawsoni," discussed and original description copied ... 497, 498 



eximia, surface ornamentation discussed 301 



"exunguis," m.entioned 531 



"? favosa," type of Obolella (Glyptias) 599 



"feistmanteli," mentioned 332 



lesueuri, compared mth Delgadella lusitanica 560 



" ? monilifera," type species of Mickwitzia 329 



" ? ordovicensis,'^ discussed 515 



"peialon," generic and specific reference discussed 403 



"pinnaformis," discussed 547,548 



"prima," mentioned 386 



" ? producta," discussed 515 



Touaulti, compared with Mickwitzia sp. undt 332 



mentioned 584 



" ? warthi," discussed and compared with Lingulella kiuren- 



sis 511 



" (?) sp. Matley," discussed 703 



"sp. Siemiradzki," discussed 531 



Lingula flags, in generalized section for England, Scotland, and 



Wales, listing species and locahties 135-136 



mentioned 541 



Lingula flags, Lower (Upper Cambrian), localities in 318c, 



318g, 36ed-n 



Lingula flags, Middle (Upper Cambrian), localities in 304g, 366a 



Lingula flags, Upper (Upper Cambrian), localities in 305d, 



318, 318a, 318b, 318s-v, 366s 



Lingula or Lingulella sp. Linnarsson, discussed 499 



lingulxformis, see Lingulella (Leptembolon). 



LiTigulasma, classification 310 



Hall and Clarke on development of 309 



mentioned 297 



platform mentioned 309 



schuclierti, classification of 310 



intermediate between Obolus (Fordinia) and Dino- 

 bolus 310 



Lingulella, described 468 



cardinal area discussed 304 



classification of. 321, 323 



compared with "Euobolus" 378 



Leptobolus 503 



Lingulella (Lingulepis) 544, 545 



Lingulella (Lingulepis) acuminata 544 



Obolus and Lingula 376 



Obolus (Lingulobolv^) 432 



Obolus (Schmidtia) 442 



development of 309 



evolution discussed 319 



evolution of 317 



Lingulclla—Contmned. 



general geographic and stratigraphic distribution of 



the species referred to 101-103 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of 110 



generic separation from Obolus discussed 471-472 



Hall and Clarke on development of 309 



Lower Cambrian species of, discussed 472-473 



mentioned 379, 3S6, 388, 401, 414, 474, 484, 489, 490, 495, 500, 



503, 508, 511, 527, 532, 539, 541, 647, 557, 558, 560, 590, 604 



muscle scars discussed 312 



number of Ordovician species and varieties of 113 



number of species of, in different types of sediment . . 100 



oldest species 530 



platform discussed 310 



relative position of vascular sinus in species of 377 



stratigraphic distribution discussed 473 



subdivision of, on basis of outlines of ventral valve 470 



surface ornamentation discussed 302 



type species "Lingula davisi" 469 



umbonal muscle mentioned 313 



vascular markings discussed 311 



young shells more circular in outline than adult shells. . 473 



acutangula, described 474 



compared with Lingulella ampla , 477, 478 



Lingulella buttsi 484 



Lingulella clarkei 485 



Lingulella cuneola 488 



Lingulella davidsoni 489 



Lingulella grandis 503 



Lingulella isse 510 



Lingulella lineolata 516 



Lingulella nathorsti 473 



Lingulella perattenuata 524 



Lingulella radula 529 



Lingulella schucherti 472 



Lingulella tarpa 535 



Lingulella (Lingulepis) acuminata 546 



Lingulella (Lingulepis) robcrti 557 



Obolus 471 



Obolus apollinis 472 



Obolus lamborni 394, 395 



Obolus selwyni 413, 414 



Obolus ( Weslonia) aurora 452 



Obolus ( Westonia) ella 456 



Obolus ( Westonia) euglyphus 461 



Obolus ( Westonia) prUandensis 462 



Obolus ( Westonia) rogersi 464 



general geographic and stratigraphic distribution tab- 

 ulated ' 101 



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



muscle scars discussed 312 



type specimen not figured. 



platform mentioned 310 



visceral area (splanchnoeoele) characterized 470 



"f affinis," type of Obolus (Lingulobolus) 378,431 



agnostoTum, described 476 



general geographic and stratigraphic distribution tab- 

 ulated 101 



type specimen not figured. 



ampla, described 477 



compared with Lingulella oweni 523 



Lingulella phaon 525 



Lingulella pogonipen^is *. 526 



Lingulella (Lingulepis) starri 559 



Obolus lamborni 394 



Obolus ( Westonia) aurora 452 



Obolus ( Westonia) ella 456 



Obolus ( Westonia) notchensis 463 



Obolus ( Westonia) stoneanus 465 



genera! geographic and stratigraphic distribution tab- 

 ulated 101 



type specimen figured PI. XXVIII, fig. 1 



visceral area (splanchnoeoele) characterized 470 



arguta, described 478 



compared with Lingulella iris 509 



general geograf>hic and stratigraphic distribution tabu- 

 lated 101 



type specimen figured PI. XXIV, fig. 5 



