. Smithsonian miscellaneous collections . ta, 22, 83, pi. 15ScoHthus, 12, 21, pi. IISombrerella, 71 mexicana, 22, 707, pi. 20Sonoraspis, 14, 17, 30, 52, 137 gomezi, 52, 54, pis. 14, 31 torresi, 52, 5J, 54, 55, pis. 14, 31Strotocephalus, 74, 76, 79, 157 arrojosensis, 20, 13/, pi. 21 gordonensis, 158Syringocnema favus, 34 ? sp., 21, 27, 33, pis. 8, 9Syringocnemidae, 33Syspacephalus zone, 71 Torres, L., i, 49 Tren formation, 4, 9, 12, 14, 15, 16, il19, 66, 78, 81, pis. 1-3 Trilobites, 49, 60, 62, 65, 66, 70references, 59, 159 Walcott, C. D., 51, 52, s6, 57, S8, 61Wanneria, 71, 72, 73, 96, 97 hall
. Smithsonian miscellaneous collections . ta, 22, 83, pi. 15ScoHthus, 12, 21, pi. IISombrerella, 71 mexicana, 22, 707, pi. 20Sonoraspis, 14, 17, 30, 52, 137 gomezi, 52, 54, pis. 14, 31 torresi, 52, 5J, 54, 55, pis. 14, 31Strotocephalus, 74, 76, 79, 157 arrojosensis, 20, 13/, pi. 21 gordonensis, 158Syringocnema favus, 34 ? sp., 21, 27, 33, pis. 8, 9Syringocnemidae, 33Syspacephalus zone, 71 Torres, L., i, 49 Tren formation, 4, 9, 12, 14, 15, 16, il19, 66, 78, 81, pis. 1-3 Trilobites, 49, 60, 62, 65, 66, 70references, 59, 159 Walcott, C. D., 51, 52, s6, 57, S8, 61Wanneria, 71, 72, 73, 96, 97 halli, 89 mexicana, 97 mexicana prima, 19, 68, 96, 99,pi. 18 occidens, 97 rowei, 97 sp. undet., 22, 99, pi. 19 walcottana, 71 walcottana buelnaensis, 21, 98,pi. 19West Buelna, 12, 164Wimanella, 46 rossensis, 47 sp., 20, 4/, pi. 13 takayamai, 47 Zacanthoidae, 137 Zacanthoides, 14, 66, 73, 75, 77, 80, 143 aff. Z. holopygus, 19, 20, 143, pi. 30 idahoensis, izi4 cf. Z. walapi, 80 PLATES SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL 119, NO, 1. PL. 1. ro
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