846 



CAMBMAN BRACHIOPODA. 



Micromitra {IpMdella) nyssa, described 360 



compared \vith Micromitra {Iphidella) Ionise 359 



general geographic and stratigraphic distribution 



tabulated 99 



stratigraphic position mentioned 359 



surface ornamentation discussed 301 



type specimen figured PI. Ill, fig. 9 



OTTiateUa, described 360 



apical foramen in, discussed 334, 335 



apical opening in embryonic stages discussed 335 



area in dorsal valve mentioned ' 334 



association mentioned 340 



compared with Micromitra (Iphidella) nyssa 360 



Micromitra (Iphidella) pannula 335, 362 



Micromitra (Paterina) bella 334 



Micromitra (Paterina) labradorica swaiUoncnsis . 334 



Micromitra (Paterina) wapta 357 



general geographic and stratigraphic distribution tab- 

 ulated 99 



interior of, described so far known 333 



surface ornamentation representative 336 



type specimen not figured. 



pannula, described 361 



apical depression in 335 



area of dorsal valve described 334, 335 



cardinal area discussed 303 



compared with Acrothele bellapunctata 633, 637 



BotsfordvL pulchra 602 



Discinolepis granulata 664 



Kutorgina perugata 584 



Micromitra alabaraaensis 337 



Micromitra (Iphidella) nyssa 360 



Micromitra (Iphidella) ornatella 335, 361 



Micromitra (Iphidella) pannula ophirensis 365 



Micromitra (Paterina) bella 334 



Micromitra (PateriTia) labradorica swantonensis. 334 



delthyrium discussed .: 318 



general geographic and stratigraphic distribution tab- 

 ulated 99 



habitat and distribution mentioned 159 



stratigraphic position mentioned 316. 336j 355, 356 



surface ornamentation characterized 333, 336, 341 



surface ornamentation discussed 301,302,336 



type specimen figured PI. rv, figs, ig and 16 



varieties of, characterized 363, 364, 365 



pannula maladensis, described 364 



characterized 363 



compared with Micromitra ( Iphidella) louise 359 



Micromitra (Iphidella) pannula 363 



general geographic and stratigraphic distribution tab- 

 ulated 99 



type specimen figured PI. IV, fig. 2e 



pannula ophirensis, described 365 



characterized 363 



general geographic and stratigraphic distribution tab- 

 ulated 99 



interior of, described so far as known 333 



stratigraphic distribution 336,337 



type specimen figured PI- IV, fig. 4a 



Micromitra (Paterina), described 343 



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



cussed 334, 335 



classification of. 321, 322 



evolution of 317 



general geographic and stratigraphic distribution of 



the species referred to 98 



general stratigrapliic distribution and number of Cam- 

 brian species and varieties of 110 



interior of, described'so far as known 333 



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



species referred to, listed 336 



surface ornamentation discussed 301 



systematic position discussed 335 



type of ornamentation characteristic of 333, 336 



type species discussed -'- 336. 344 



type species Micromitra (Paterina) labradorica swan- 

 tonensis 344 



mentioned 352 



Micromitra (Paterina) bella, described 344 



apical foramen in, discussed 334, 335, 345 



area in dorsal valve not seen 334= 



cardinal area discussed 303 



compared with Micromitra pealet , 339 



Micromitra sculptilis 341 



Micromitra (Iphidella) ornatella 334 



Micromitra (Iphidella) pannula..,.- 334,363 



Micromitra (Paterina) crenistria 345 



Micromitrg- (PateriTia) labradorica 334 



Micromitra {Paterina ) supcrba 335, 356 



general geographic and stratigraphic distribution tab- 

 ulated 99 



not the type of Micromitra (Paterina) 336 



surface ornamentation representative 336 



type specimen discussed 335, 345., 350 



type specimen figured PI. II, fig. Ic 



type specimen (7) referred to Micromitra (Paterina) 



logani 335, 345, 350 



crenistriay described 345 



compared with Micromitra pealei 335 



Micromitra ( Paterina) logani . . _ 345, 350 



Micromitra (Paterina) stuarti 355 



general geographic and stratigraphic distri'butioii tab- 

 ulated - 99 



type specimen figured PI. Ill, figs. 4, 4a-b 



etheridgei, described 346 



general geographic and stratigraphic distribution tab- 

 ulated 99 



type specimen figured PI. Ill, fig. 10 



labradorica, described : 347 



area in dorsal valve mentioned ^ 334 



association mentioned 328 



compared with Kutorgina 333 



Micromitra alabamaensts 337 



Micromitra pealei 339 



Micromitra pusilla 340 



Micromitra sculptilis 335 



Micromitra (Iphidella) nyssa 360 



Micromitra (PateriTia) bella 334 



Micromitra ( PateriTia) crenistria 345 



Micromitra (Paterina) labradorica swantonensis. 349 



Micromitra (Paterina) labradorica utahensis 349 



Miicromitra (Paterina) labradorica var. undt... 350 



Micromitra (Paterina) major 351 



Micromitra (Paterina) philUpsi 352 



Micromitra ( Paterina) stissiTigensis 353 



Micromitra ( Paterina ) supcrba 356 



Micromitra ( Paterina) undosa 357 



Micromitra (Paterina) wapta 357 



general geographic and stratigraphic distribution tab- 

 ulated 99 



interior of, described so far as known 333 



notes on generic reference of 334 



stratigraphic position mentioned 316. 318 



surface. ornamentation characterized 333,336 



t5T>e specimen figured PI. II, fig. 2 



labradorica orientalis, described 348 



compared with Obolus obscurus 407 



general geographic and stratigraphic distribution tab- 

 ulated 99 



type specimen figured PI. II, fig. 11 



labradorica swantonensis, described 348 



compared with Micromitra alabamaensis 337 



Micromitra (Iphidella) ornatella 334 



Micromitra (Iphidella) pannula 334 



Micromitra (Paterina) labradorica 347 



Micromitra (PateriTia) labradorica orientalis 348 



Micromitra (Paterina) labradorica. utahensis 349 



Micromitra (Paterina) prospectensis 353 



general geographic and stratigraphic distribution 



tabulated 99 



surface ornamentation representative 336 



type of Beecher's genus "Paterina'* 334, 344, 349 



type species of Micromitra (Paterina) 344 



type specimen figured PI. II, fig- 3 



labradorica utahensk, described 349 



compared with Micromitra (Paterina) stuarti 355 



