INDEX. 



3 6l 



PAGB. 



Obolus mindina Walcott, compared with Obulic, obscurit; 67 



obscunis Walcott. described (ttt 



figured, pt. i, figs. 12, iia-d 230 



compared with Micramitra labradorica orientalis. . . 67 



Obolus chinensis 67 



Obolus mindina 67 



Obolus rhea 67 



Obolus (Acritis) antiquissimns Eichwald. ... 67 



Obolus (Acritis ?) rugatus Walcott 67 



(=Obolclla gracilis), identified by Walcott from 



Tsing-tshou-fu 7 



in synonymy 66 



listed from lower portion of Kiu-lung group 51 



Shan-tung and Shan-si areas 57 



stratigraphic and geographic position of 35 



prindlei Walcott, related to Obolus chinensis 64 



rhfa Walcott. compared with Obolus obscurus 67 



shansiensis Walcott, described 67 



figured, pi. 2, figs. 4, $a-g 232 



compared with Obolus watina'is 68 



Obolus minimus 66 



Obolus tetonensis 68 



in synonymy 67 



listed from Shan-tung and Shan-si areas 57 



under Shan-tung and Manchuria areas. ... 57 



with Kiu-lung fauna 52 



stratigraphic and geographic position of 35 



shensiensis, synonymic reference. 67 



tetonensis Walcott, compared with Obolus shansiensis 68 



(Acritis) antiqnissitnus Eichwald, compared with Obolus 



obsctints 67 



(Acritis ?) rugatus Walcott. compared with Obolus obscurus 67 

 (Lingult'lla) chinensis ( Obolus chinensis), synonymic ref- 

 erence 64 



(Lingulella) damesi ( = Obolus damesi), synonymic reference 65 

 (Lingulepis) eros Walcott (= Lingulella (Lingulepis) eras), 



former and present generic reference 9 



synonymic reference 70 



(Lingnlepis ?) sp. undt. Walcott ( = Lingulella (Lingulepis 



/) sp. undt.), former and present generic reference. . 10 



synonymic reference 70 



(IVeslonia) baltints, related to Obolus (Westonia) black- 

 welder i 68 



related to Obolus (Westonia) winiani 68 



(\VfStonia) blackwelderi Walcott. described 68 



figured, pi. 2, figs. 5, sa-c . . . . 232 



compared with Obolus (\Vestunia) sp. undt. . . 69 



in synonymy 6S 



listed from Ku-shan shale ... 53 



with Kiu-lung fauna 52 



stratigraphic and geographic position of 35 



(IVestonia) U'imani, related to Obolus (\Vestonia) blttck- 



teelderi 68 



(Westonia) sp. undt., described and discussed 69 



compared with Obolus (Westonia) blackwelderi , ... 69 



in synonymy 69 



listed from Ch'ang-hia district 54 



stratigraphic and geographic position of . 35 



obscura, see Agraitlos. 

 obscurus, see Obolus. 



Ogygopsis Walcott, distinctive in North American fauna 56 



Olenellus Meek, Calla'-ia cited in place of 49 



cited from Lena limestone ... 58 



compared with Blackwelderia 117 



forms in Australia referred to 104 



referred by von Toll from Lena limestone. . . 58 



? forresti, correlated with Kcdlithia 50 



? Olenellus sp. undt., listed from Cambrian fauna of Siberia. . . 5 



Olcnidx, compared with Dorypyge 107 



Olenoides, compared with Blacku'ddcria sincn\i\ , . 122. 123 



1'iinicsella 124 



Dorypyge . . 107, 244 



Dorypyse r'uhthofeni Dames 108 



in synonymy 1 07 



omission of, from Chinese fauna 48 



127 



244 



107 



4 



121 



123 



124 



72 



291 



PAOS. 



( lf>n>!,lt s - Continued. 



synonymous or congeneric with Dvrypygr. in synon- 

 ymic reference 107 



and Damesella, possibly referable to Teinistion . . . 110 

 and Dorypyge, separated from Damesella black- 



U'dderi 



(?) cilix Walcott ( = Blacku'dderia cilix), former and pres- 

 ent generic reference 10 



synonymic reference 119 



curttcei Walcott, figured, pi. s, figs. 8. 8a-c 



compared with Dorypyge richthofeni i&vis 



leblanci Bergeron (= Blackwelderia sinensis), former and 



present generic reference 



listed with Cambrian fauna described by Bergeron . 



synonymic reference 



united with Calymmene 1 sinensis under Black'cel- 



deria sinensis 



marcoui Whitfield, compared with Damesclla blackwelderi 



and Blackwelderia sinensis 127 



nevadcnsis (Meek), figured, pi. 8, fig. 7 244 



type species, compared with Dorypyge 107 



(Dorypyge) richthofeni ( =Dorypygerichihofeni), listed from 



Lai-wu 6 



Omphalotrochus, compared with Euomphalus sp 326 



Ophir City, Utah, Miiromitra (Iphiddla) pannulii in limestoneat 63 



Opisthoparia and Proparia, compared 



Orbiculti ? crassa Hall, compared with Obolella asiatica 



Ordovician. faunas from both Silurian and, discussed. 



fossils of, from China. Europe and North America, dis- 

 cussed 292 



Illanurus eitrekensis at base of 223 



range of Middle Sinian. Kiu-lung group to 50 



range of Triplecia in 293 



relation of Cambrian to 32 



section of Upper Cambrian and Lower . 45 



Ordovician age, comparison of specimens of, from Ki-sin-ling 



limestone and North America 283 



Ordovician faunas, Chinese compared with European 282 



comparison of, with Middle Cambrian Trilobita 4* 



from Shen-si, compared with Ki-sin-ling limestone 290 



of Europe, relationship with Chinese fauna 293 



Ordovician fossils of Kayser, geologic horizon of, correlated with 



those of Carnegie Institution expedition 292 



comprised in two collections 279 



identified from Shan-tung 279 



report on, by Stuart Weller 279 



Ordovician localities, of China C39, C 53, C 59, C64, and C6S. 21-24 



C?, 20/C, 20/B 279-281 



orifntali-i, see Helcionella rttgosa, Htmiptychina. Hucnella, Iphi- 

 d?Ua labradorica, Microdiscus, Micromitra (Paler in a) labra- 

 dorica. Stenotheca rugosa, Syntrophia, and Yorkitt. 

 ornalus, see Conocephalitc^. 

 orthta, see Syntrophia. 



Orthi*. compared with Clciothyridina ? sp ... 323 



compared with Ortholichia ? sp 317 



genus cited from Gottsche 



caUigratnma Dalman, described 



figured, pi. 25, figs. 3-6 



geographic distribution of, discussed .... 



in synonymy 



4 



282 

 294 

 193 



282 



listed under Ordovician locality 20, C 281 



ciilli gramma Dalraan var., listed and discussed 291 



c alii gramma var. davidsoni Martelli, synonymic reference. 282 

 caUigrainina Dalman, var. davidsoni de Verneuil, listed and 



discussed 290 



t alligramma var. srrica Martelli, synonymic reference .... 282 

 calligramma Dalman, var. serica var. nov., listed and dis- 

 cussed 290 



kiauischangpensis, compared with Pleclorlhis -willisi 291 



listed as from Ordovician beds of Kiau-tschang-pa 291 

 linnarssoni Kayser (=Eoortftis Ihtnarssoni). former and 



present generic reference 10 



identified from Carnegie Institution of Washington 



collection 3 



synonymic reference 83 



