s(HU(HEKT.l INDEX AND BIBLIOGRAPHY. 157 



Atrypina imbricata Hiill. Lower Helderberg (Dev.)- 



Leptocdlia imbricata Hall, Tenth Rep. New York State Cab. Nat. Hist., 1857, 



p. 10.S;— Pal. New York, III, 1859, p. 246, pi. 38, figs. 8-13.— Billiugs, Geol. 



Canada, 1863, p. 957, lig. 452. 

 Treraatospira imbricata Hall, Sixteenth Rep. New York State Cab. Nat. Hist., 



1863, !>. 60;— Trans. Albany Institute, IV, 1863, p. 146.— Keyes, Geol. Survey 



Missouri, V, 1895, p. 96. 

 Trematospira ? imbricata Meek and Worthen, Geol. Survey Illinois, III, 1868, p. 



381, pi. 7, fig. 2. 

 Atrypina imbricata Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, pi. 53, 



figs. 5, 6, 8-10. 

 Loc. Albany and Schoharie counties. New York; Perry County, Missouri. 



Atrypina intermedia (Hall), Arisaig (Sil.). 



Leptocu'lia intermedia Hall, Canadian Nat. (ieol,,V, 1860, p. 147, fig. 5. — Daw- 

 son, Acadian Geology, 3d ed., 1878, p. 598, fig. 202. 

 Loc. Arisaig, Nova Scotia. 



Avicula desquamata Hall=Obolella crassa. 



AUIACORHYNCHUS Dittmar. Genotype A. pachti Dittmar. 



Aulacorhyuchus Dittmar, Verhand. Kais. Mineral. Gessel. St. Petersburg, 2d. 

 8er.,VII, 1871, p. 1, pi. 1, figs. 1-13.— Hall and Clarke, Pal. New York, VIII, 

 Pt. II, 1893, p. 311;— Thirteenth Ann. Rep. New York State Geologist, 1895, 

 p. 904. 



Isogramma Meek and Worthen, Geol. Survey Illinois, V, 1873, p. 568. 



Aulacorhynchus millipunctatum (Meek and Worthen). Up. Coal Meas. 

 Chonetes ??millipunctata Meek and Worthen, Proc. Acad. Nat. Sci. Philadelphia, 



1870, p. 35;— Geol. Survey Illinois, V, 1873, p. 566, pi. 25, fig. 3. 

 Isogramma millipunctata Meek and Worthen, Ibidem, 1873, p. 568. 

 Aulacorhyuchus millipunctatus Hall and Clarke, Pal. New York, VIII, Pt. II, 



1893, p. 312, pi. 83, figs. 14, 15. 

 Chonetes millipuuctatus Keyes, Geol. Survey Missouri, V, p. 54. 

 Loc. Marion County, Illinois; Kansas City, Missouri. 



Aulosteges giiadalupensis Shumard = Stroplialosia guadalupensis. 

 Aulosteges si^ondyliformis White and St. Johii=Strophalosia spondy- 



liformis. 

 Barrandella Hall and Clarke=Clorinda. 



BAREOISELLA Hall and Clarke. Genotype Lingula subspatulata 



Meek and Worthen (non Hall and Meek). 

 Barroisella Hall and Clarke, Pal. New York, Extract, VIII, Pt. I, 1890, p. 62;— 

 Pal. New York, VIII, Pt. I, 1892, pp. 62, 64;— Eleventh Ann. Rep. New York 

 State Geologist, 1894, p. 230. 



Barroisella subspatulata (Meek and Worthen). Black Slate (Dev.). 



Lingula subspatulata Meek and Worthen (non Hall and Meek), Geol. Survey 



Illinois, III, 1868, p. 437, pi. 13, fig. 1. 

 Lingula subspatulata? A. Winchell, Proc. American Phil. Soc, XII, 1870, p. 248. 

 Barroisella subspatulata Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, 



p. 63, pi. 2, figs. 14-16 and p. 164. 

 Xoc. Jonesboro, Illinois; Louisville and Lebanon, Kentucky; Rockford, Indiana. 



BEACHIA Hall and Clarke. Genotype Meganteris suessana Hall. 



Beachia Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 260;— Thirteenth 

 Ann. Rep. New York State Geologist, 1895, p. 850. 



