NO. 3 CAMBRIAN TRILOBITES 1 59 



Descriptions of genera and species — Continued. 

 Order Opisthoparia Beecher — Continued. 



Family Ceratopygidas — Continued. page 



Crepicephalus tumidus, new species (pi. 31, fig. 2) 217 



Crepicephalus tinea, new species (pi. 35, figs, t, la-e) 217 



Crepicephalus unsia, new species (pi. 34, figs. 7, 7a) 217 



Crepicephalus upis, new species (pi. 33, figs. 4, 4a-d) 218 



Crepicephalus, species undetermined (i) (pi. 32, figs. 4, 4a) . . 218 



Crepicephalus, species undetermined (2) 218 



Amphion ? matutina Hall (pi. 26, fig. 8) 219 



Genus Wanneria Walcott 219 



Wanneria walcottana (Wanner) (pi. 38, figs, i, 2) . . . , 219 



Family Oryctocephalidai Beecher 220 



Vanuxemella, new genus 220 



Vanuxemella contracta, new species (pi. 36, figs. 4, 4a) 221 



Vanuxemella nortia, new species (pi. 36, fig. 5) 222 



Genus Karlia Walcott 223 



Karlia mitior Walcott (pi. 36, figs. 7, ya-c) 224 



Karlia stephenensis Walcott (pi. 36, fig. 8) 224 



Hanburia, new genus 225 



Hanburia gloriosa, new species (pi. 36, figs. 3, 4) 226 



Genus Tsinania Walcott 227 



Tsinania cleora, new species (pi. 36, figs. 9, ga-c) 227 



Tsinania elongata, new species (pi. 36, figs. 10, toa) 228 



Conasauga formation 228 



PLATES 



24. Acrocephalites stenomctopus (Angelin), A. americanus Walcott, A. 



haynesi Walcott, A. nudtisegmentus Walcott, and A. tutus 

 Walcott 230 



25. Acrocephalites insignis Walcott, Alokistocare subcoronatum (Hall and 



Whitfield), A. althca Walcott, A. labrosum Walcott, A. pomona 

 Walcott, A. linnarssoni (Walcott), and A. prospectcnse (Wal- 

 cott) 232 



26. Acrocephalites ? majus Walcott, A. vulcanus (Billings), A. aoris 



Walcott, Menomonia calymenoides (Whitfield), Drcsbachia aniata 

 Walcott, Alokistocare ticida Walcott, Acrocephalites glomeratus 

 Walcott, Amphion ? matutina Hall, and Acrocephalites ? aster 

 (Walcott) 234 



27. Norwoodia saffordi Walcott, N. gracilis Walcott, and iV. simplex 



Walcott 236 



28. Norwoodia ponderosa Walcott, A'', tenera Walcott, Millardia semele 



Walcott, M. optata (Hall), and M. avitas Walcott 238 



29. Crepicephalus iowensis (Owen), C. texanus danace Walcott, C. texanus 



elongatus Walcott, C. liliana Walcott, C. augusta Walcott, and 



C. texanus (Shumard) 240 



30. Crepicephalus texanus ( Shumard) 242 



31. Crepicephalus thoosa Walcott, C. tumidus Walcott, and C. comus 



Walcott 244 



