236 CALIFORNIA ACADEMY OF SCIENCES. 



Paleontology of the Black Hills of Dakota. 



In U. S. Geog. and Geol. Survey Kocky Mountain Region. Eep. Geol. 

 and Resources of the Black Hills of Dakota, with atlas; by Henry New- 

 ton and Walter Jeiiiiey, Washington, 1880, p. 325, pi. 2. 



Crepicephalus planus n. sp., C. centralis n. sp. 



Palaeontology. 



In Geol. Wisconsin, vol. 4, 1882, pt. 3, pp. 163-363, pis. 1-27. 



Potsdam Sandstone: (Dicellocephalus zone.) Conocephalites <calymen- 

 oides Whitf. Dicellocephalus lodensis Whitf., D. crassimarginatus 11. sp. 

 Conocephalites quadratus n. sp., C. (Ptychaspis? ) explanatus n. sp. Crep- 

 icephalus onustus Whitf., C.? gibbsi 11. sp. Ptychaspis granulosa Owen, 

 P. striata 11. sp., P. minuta Whitf. Dicellocephalus minnesotensis Owen, 

 Ayraulos (Bathyurus? } woosteri Whitf. ArioneUus convexus Whitf. 

 Ellipsocephalus curtits Whitf. Aylaf>f)if> eatoni 11. sp. 



Species from the Lower Magnesian Limestone: Dicellocephalus barabu- 

 ensis Whitf., D. eatoni Whitf. Illcenurus convexus Whitf. 



Species from the Trenton Limestone: Asaphus susce Calvin MS., A . 

 homalonotoides Wai. Illctnus ovatus Conrad. 



Species from the Niagara Group, 111.: I litmus ioxus Hall, /. insiynis 

 Hall, /. imperator Hall, /. madison/anns n. sp., /. pterocephalus Whitf. 

 Bronteus laphami Whitf. tijjhtzrexochus rominyeri Hall. 



Devonic: Leperditia alta Conrad. Phacops rana Green. 



Description of new species of fossils from 



Ohio, with remarks on some of the geological forma- 

 tions in which they occur. 



In Annals New York Acad. Sci., vol. 2, Nos. 7, 8, 1882, p. 193. 

 Eurypterus eriensisn. sp. Leperditia anyulifera n. sp. Plumulites new- 

 berryi 11. sp. 



On the fauna of the Lower Carboniferous 

 limestones of Spergen Hill, Indiana, with a revision 

 of the descriptions of its fossils heretofore published, 

 and illustrations of the species from the original type 

 species. 



In Bull. Am. Mus. Nat. Hist. New York, vol. 1, No. 3, 1882, pi. 9. 



Leperditia carbonaria Hall. Cytherina ylandella 11. sp. 



Plates republished iu 12th Rep. Geol. Nat. Hist. Indiana, 1882. 



List of Wisconsin fossils. 



In Geol. Wisconsin, vol. 1, 1883, p. 362; also illustrations of typical 

 fossils of the Wisconsin formations. 



Fig. 15 is an entire specimen of Dicellocephalus minnesotensis Owen. 



