Ixxii 



THE PALEONTOLOGY OF MINNESOTA. 



Rosalina asterites, 45. 



maorica, 44. 



marginata, 42. 



orbiculus, 44. 



weinkauffii, 44. 

 Rosiflorese, 5, 

 Rotalia ammonoides, 44. 



aspera, 41. 



canariensis, -l. r >. 



capitata, 44. 



centralis. 41. 



densa, 41. 



gtolulosa, 41. 



laxa, 41. 



leptospiru, 40. 



marginata, 42. 



pachyompkala, 41. 



paupercula, 45. 



perforata. 41. 



pertusa, 41. 



protacmaea, 41. 



quatema, 41. 



rosa, 41. 



rudis, 40. 



senaria, 40. 



tracheotetras, 41. 

 Eotalina cultrata, 45. 



inflata, 28. 



spinimargo, 45. 

 Rotalinse, 44. 



Saganella, ISO. 

 Salix, 8, 5, 15. 



proteifolia, 9/.21, 22. 

 Sapindus, 8, 5. 



morrisoni, 19, 9, 22. 

 Sassafras, 7, 5. 

 Scalaripora, 106, 110. 



Scaphites nodosus var. quadrangularis. 53. 

 Scenellopora, 107, 109, 121. 

 Scenidium, 381, 377, 382. 



anthonensis, 3*1, 333, 473. 



halli, 381. 



Sceptropora, 106, 189, 191. 

 Schizambon, 36O, 359-362. 



dodgii, 361, 360,362. 



flssus var. canaclensis, 362, 359, 361. 



lockii, 362, 360. 



typicalis, 360, 361. 

 Schizambonia, 360. 

 Schizocrania, 369, 361, 371. 



fllosa, 37O, 371*. 

 Schizotreta, 365, 364. 



conica, 265, 366. 



minutula, 366*. 



ovalis, 366. 



pelopea, 366, 334, 366. 

 Selaginella, 3. 

 Selenoides, 61. 



iowensix, 64. 

 Selenopora, 107, 110. 

 Semicoscinium, 106, 110, 212, 214. 

 Senonian, lower, 4. 

 Septa, 98. 



Septopora, 106, 110, 111. 

 Sequoia brevifolia, 10. 

 species, 22. 

 winchelli, 1O, 9,22. 

 Shale, preparation, 26. 

 Sigillaria, 6, 2. 



Silurian, Brachiopoda of Lower, 332-474; Bryozoa 

 of Lower, 96-332; Bryozoa of Upper, 109; Sponges, 

 graptolites and corals of Lower, 55-95; land 

 vegetation in middle, 1. 

 Siphonotreta, 358, 359. 



minnesotensis, 358, 359, 362. 

 scotica, 359. 

 unguiculata, 358. 

 Siphonotretidae, 358, 363. 

 Skenidium, SSI. 

 anlhonensis, 381. 

 halli, 381. 

 Solenopora, 80. 

 compacta, 8O. 

 spongoides, 80. 

 Spatangus spines, 52. 

 Spatiopora, 319, 102, 107, 321. 

 areolata, 320. 

 aspera, 319. 

 iowensis, 321. 

 labeculosa, 32O, 321. 

 lineata, 320. 

 maculosa, 321, 320. 



var. incepta, 320. 



Sphajrospongia, 56, 64, 72; Tossellata, 58. 

 Spluerulix hispidcK, 35, 

 Sphenophyllum, 2. 

 Sphragiopora, 106, 110, 111. 

 Sphragioporida;, 106. 

 Spiniform, corallites, 98; tubuli, 98. 

 Spirifer, 337, 454, 469. 



biforatits var. lynx 455. 

 incequivalvis, 459. 

 lynx, 457. 



slieppardi, 455, 457. 

 Spiriferidaj, 469, 465, 470. 

 Spiroplecta, 31, 28. 



americana, 31, 52. 

 Spiropora, 123. 



regularis, 123. 

 Sponge spicules, 52. 



Sponges, chapter on Lower Silurian, 55-95. 

 Sporangites huronensis, 24. 

 Stellipora, 107, 109, 290, 311. 

 Stenotisma, 465. 

 Stenopora, 107, 98, 111. 

 Sterculia, 5. 



Stictopora, 106, 124, 128, 17G. 

 amta, 155. 

 basalis, 128. 

 fidelis, 134, 135. 

 labyrinthica, 144, 145. 

 magna, 174. 

 inultifida, 174. 

 mutal/ilis, 125. 



var. minor, 135, 127. 

 paupera, 129, 130. 

 shaffen, 176. 

 Stictoporella, 179, 106, 110, 162, 163, 180, 185. 



