INDEX. 



845 



Mickwitzia monilifera — Continued. 



general geographic and stratigraphic distribution 



tabulated 



type specimen not figured. 



occidens, described 3 



compared with Mickwitzia pretiosa 331-3 



general geographic and stratigraphic distribution 



tabulated , 



type specimen figured PI. VI, fig 



'pretiosa, described 3 



compared with Mickwitzia monilifaa 3 



Mickwitzia occidens 331-3 



general geographic and stratigraphic distribution 



tabulated 



type specimen figured PI. VI, fig 



sp. undt. , described 3 



compared with Lingula rouaulti 3 



Micktoitzia monilifera 2 



general geographic and stratigraphic distribution 



tabulated 



type specimen not figured. 

 Mickwitzia conglomerate (Lower Cambrian), in generalized section 



for Russia, listing species and localities 1 



in generalized section for Sweden, Denmark, Finland, and 



Norway, listing species and localities ] 



locality in 39 



Microdiscus conneius, association mentioned 7 



Microdiscus punctatus, association mentioned 498, 7 



MicTomitra, described 2 



apical depression, slit, or foramen in species of, dis- 

 cussed t 334, 335, 1 



cardinal area discussed 303, S 



classification of. 321, c 



compared with Acrothelc 631, f 



Acrotkele woodwoHhi ( 



AcTotreta f cancellata i 



Curticia c 



Eutorgina 580, i 



Linnarssonella ( 



Mickwitzia 329, 330, i 



ScHzambon ? esthonia ( 



Volborthia J 



delthyrium discussed ; 



evolution discussed c 



evolution of i 



general geographic and stratigraphic distribution of 



the species referred to 



general stratigraphic distribution and number of Cam- 

 brian species and varieties of ] 



interior of, unknown i 



mentioned 316, 344, 349, 357,359,361, ( 



muscle scars not shown in c 



notes on use as a generic name 334, c 



number of species of, in different types of sedi- 

 ment ] 



shell substance i 



species referred to, listed c 



stratigraphic distribution ; 



surface ornamentation discussed , ; 



systematic position discussed ; 



type of ornamentation characteristic of 333, 335, i 



type species Micromitra sculptilis 333, 335, c 



alabamacnsis, described ; 



compared with Micromitra (Paterina) labradorica 



general geographic and stratigraphic distribution 

 tabulated 



type specimen figured PI. II, fij 



haydeni, described 



compared -with Micromitra sculptilis 



general geographic and stratigraphic distribution 

 tabulated 



habitat mentioned 



type specimen figured text fig. 20A, 



nisus, described 



general geographic and stratigraphic distribution 

 tabulated 



type specimen figiu-ed PI. II, fig 



pealei, described 



apical slit in discussed 



Micromitra pealei — Continued. 



compared with Linnarssonella girtyi 666 



Micromitra nisus 338 



Micromitra (Iphidclla) louise 359 



Micromitra (Paterina) crenistria 335 



Micromitra (Paterina) stuarti 356 



delthyrium discussed 318 



general geograpliic and stratigraphic distribution 



tabulated 99 



surface ornamentation discussed 301 



type specimen figured PI. Ill, figs. 3, 3a-b 



pusilla, described 339 



association mentioned 340 



compared with Micromitra scotica 340 



general geographic and stratigraphic distribution tab- 

 ulated ' 99 



tj'pe specimen not figured. 



scotica, described 340 



association mentioned 340 



general geograpliic and stratigraphic distribution tab- 

 ulated - 99 



type specimen figured text fig. 21 A, 340 



sculptilis, described ■. 341 



compared with Micromitra alabamaensis 337 



Micromitra sculptilis endlichi 342 



Micromitra haydeni 338 



Micromitra nisus 338 



Micromitra pealei 339 



Micromitra zendbia 342 



Micromitra sp. undt 343 



Micromitra (Ipkidella) pannula 362, 363 



Micromitra (Paterina) labradorica 335 



Micromitra (Paterina) stissingensis 353, 354 



general geograpliic and stratigraphic distribution tab- 

 ulated 99 



labeling of type specimen described 334 



stratigrapliic distribution 336 



surface ornamentation characterized 333, 335, 336 



surface ornamentation discussed 301 



tj-pe species of Micromitra 335, 336 



type specimen figured PI. Ill, fig. 5 



sculptilis endlichi, described 342 



general geographic and stratigraphic distribution tabu- 

 lated 99 



type specimen figured text fig. 22, 342 



zenoMa, described 342 



compared with Micromitra (Paterina) stissingensis 354 



Micromitra (Paterina) stissingensis ora 354 



general geographic and stratigraphic distribution tabu- 

 lated .- 99 



type specimen figured text fig. 23, 342 



sp. imdt., described 343 



general geographic and stratigraphic distribution tabu- 

 lated 99 



type specimen figured PI. Ill, fig. 7 



Micromitra (Iphidella), described 359 



apical depression, sht, or foramen in species of dis- 

 cussed 334, 335 



classification of 321, 322 



compared with Obolus and Rhinobolus 335 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 99 



general stratigraphic distribution and number of 



Cambrian species and varieties of 110 



interior of, described so far as kno\vn 333 



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



species referred to, listed 336 



stratigraphic distribution of 336, 337 



surface ornamentation discussed 301 



systematic position discussed 335 



type of ornamentation characteristic of 333, 336 



type species " Trematis pannulus" 359 



louise, described 359 



general geographic and stratigraphic distribution 



tabulated 99 



stratigraphic position discussed 359 



stratigraphic position mentioned 316 



surface ornamentation discussed 301 



type specimen figured text fig. 31A, 359 



