ADDENDA. 



hallanum, S. A. Miller, 1877, Cin'ti Gr. 

 [Ety . proper name. ] Proposed instead 

 of 0. halli, in Cin. Quar. Jour. Sci., 

 which was preoccupied by Barrande. 



olorus, Hall, 1877, Trenton Gr. [Ety. 

 mythological name.] Proposed instead 

 of 0. vertebrate, Hall, 1847, which was 

 preoccupied. 



orus, Hall, 1877, Niagara Gr. [Ety. my- 

 thological name.] Proposed instead 

 of 0. columnare, Hall, 1860, which was 

 preoccupied. 



socialis, Hall, 1877, Hud. Riv. Gr. [Sig. 

 social.] Proposed instead of 0. gre- 

 'garium, Hall, 1861, which was pre- 

 occupied. 



stylus, Hall, 1877, Schoharie grit. [Sig. 

 " an upright pointed body.] Proposed 

 instead of 0. baculwn, Hall, 1862, which 

 was preoccupied. 



subcancellatum, Hall, 1877, Niagara Gr. 

 [Sig. somewhat cancellated.] Pro- 

 posed instead of 0. caneellatum, Hall, 

 1852, which was preoccupied. 



sublaeve, D'Orbigny, 1850, Prodrome de 

 Pal., Onondaga Gr. [Sig. somewhat 

 smooth.] Proposed instead of 0. Ueve, 

 Hall, 1843, which was preoccupied. 

 Phillipsia tennesseensis, Winchell, 1869, 

 Geo. of Tenn., Low. Carb. [Ety. 

 proper name. 

 Platyceras pabulocrinus, Owen, 1862, (Pile- 

 opsis pabulocrinus) Geo. Sur. Indiana, 

 Keokuk Gr. [Ety. from an erroneous 

 idea that the species subsisted on the 

 crinoid.] 

 Phitystoma lineatum, Hall, is identical with 



P. lineatum Conrad. 

 Plkurotomaria subglobosa, Hall, 1877, 

 Warsaw Gr. [Sig. somewhat globose.] 

 Proposed instead of P. rotundata, 

 Hall, 1858, which was preoccupied. 



nodulma, Hall, 1847, is probably a poor 

 specimen of Trochonema umbilicata. 



tenuimarginata, Hall, 1877, Warsaw Gr. 

 [Sig. slender-margined.] Proposed 

 instead of P. concava, Hall, 1858, 

 which was preoccupied. 



Polyphemopsis teretiformis, Hall, 1877, War- 

 saw Gr. [Sig. of a long round-shape.] 

 Proposed instead of P. elxmgata, Hall, 

 1858, which was preoccupied. 



Productus incurvatus, Shepard, 1838, Am. 

 Jour. Sci., vol. 34, Coal Meas. [Sig. 

 from the incurved basal margin.] 

 pectenoideus, Shepard, 1838, Am. Jour. 

 Sci., vol. 34, Coal Meas. [Sig. like a 

 shell of the genus Pecten.] 

 semipunctatus, Shepard, 1858, Am. Jour. 

 Sci., vol. 34, Coal Meas. [Sig. half- 

 punctated.] 



Quenstedtia, a genus, on page 60, was pre- 

 occupied in the Class Lamellibran- 

 chiata, by Morris & Lycett, in 1853. 



Streptelasma ungula, Hall, 1876, Illust. 

 Devonian Foss., Ham. Gr. [Sig. a 

 hoof.] 

 profundum, Hall, is probably identical 

 with S. (Cyathophyllum) profundum, 

 Conrad. 



Striatopora limbata, Eaton, 1832, (Madre- 

 pora limbata) Geo. Text Book, Ham. 

 Gr. [Sig. bordered.] 



Terebratula argentea, see Athyris argentea. 



Trematopora spiculata, Hall, 1877, Niagara 

 Gr. [Sig. having little points.] Pro- 

 posed instead of T. spinidosa, Hall, 

 1876, which was preoccupied. 



Zaphrentis ampla, Hall, 1876, Illust. De- 

 vonian Foss., Ham. Gr. [Sig. full, 

 large.] 

 cannonensis, Winchell, 1869, Geo. Tenn., 



Low. Carb. [Ety. proper name.] 

 eccentrica, Meek, 1871, Hayden's Geo. 

 Rep., Low. Carb. [Sig eccentric, 

 from the center.] 

 halli, Edwards & Haime, 1851, Polyp. 

 Foss. Terr. Palseoz., Ham. Gr. [Ety. 

 proper name.] 



