150 GENERAL INDEX. 



Venustodus St. John and Worthen VI, 339, 344 



argutus St. J. & W , VI.352* 



leidyi St. J. & W VI.346,348,350* 



robustus St. J. & W VI,345* 



tenuicristatus St. J. & W VI.348* 



variabilis St. J. & W VI, 346* 



Vertieillites DeFraiice VIII, 280 



Vesicularidae VIII, 434 



Vineularia DeFrance VIII,615 



Vincularidaj ; VIII, 363,301 



Woodocrinus deKoninck Ill, 478 



Worthenopora Ulrich VIII.366,403,669 



spatulata (Preut) '. VIII.670* 



spinosa Ulrich VIII, 403,669* 



Xenorhachia 11,135 



Xestorrhytias Meyer 11,140 



Xiphosura 11,393; 111,544 



Xystracanthus Leidy VI, 450,457,468 



acinaeiformis St. J. & W VI.459* 



anceps (N. & W.) VI,458,460 



arcuatus Leidy VI, 457 



mirabilis St. J. & W VI, 458* 



Yoldia Moller n,282 



" (?) levistriata M. & W 11,282* 



Zaphrentis Baflnesque 111,410; VIII. 71, 132 



calcariformis Hall VIII, 74* 



carinata Worthen VIII, 75* 



centralis E. & H VIII, 72* 



chesterensis Worthen VIII73* 



cliff ordana E. & H VIII, 75* 



cylindracea Worthen VIII, 78* 



dalei E. & H VIII, 71* 



illinoiensis Worthen VIII, 77* 



lanceolata Worthen VIII, 76* 



parasitica Worthen VIII, 79* 



pellensis Worthen VIII, 74* 



reversa Worthen VIII, 78* 



spergenensis Worthen VIII, 77* 



(spinulifera Hall) VIII, 71 



spinulosa E. & H VIII, 73* 



ulrichi Worthen VIII, 76* 



varsoviensis Worthen VIII, 78* 



sp. ind^t Ill, 410* 



Zeacrinus Troost 11,181,185,216,237,240,312; V, 426, 490, 534, 547, 563; VII,302; VIII, 91 



acanthoporus M. & W '. V.563* 



' ' arboreus Worthen V, 534* 



armiger M. & W V, 547* 



asper M. & W y, 439* 



bifurcatus M. Ch 11,241 



cariniferus Worthen V, 535* 



compactilis Worthen V, 536* 



concinnus M. & W V, 490* 



' ' coxanus Worthen '. yn, 302* 



" (?) crassus M. & W II, 314*,315t 



