150 



GASTEEOPOBA. 



lichas, Hall, 1861, (Platyostoma lichas) 

 14th Reg. Rep. N. Y., Up. Held. Gr. 

 [Ety. mythological name.] 

 Littoriria, Ferussac, 18 21, Tab. Syst. An. 

 Mollusques, etc. 

 antiqua, see Holopea antiqua. 

 cancellata, see Cyclonema cancellatum. 

 wheeleri, see Naticopsis wheeleri. 

 LoxoNEMA, Phillips, 1841, Pal. Foss. [Ety. 

 loxos, oblique; nema, a thread.] 

 aculeatum, Billings, 1866, Catal. Sil. Foss. 

 Antic, Anticosti Gr. [Sig. sharp- 

 pointed.] 

 acutulum, Dawson, 1868, Acad. GeoL, Car- 

 boniferous. [Sig. somewhat sharp- 

 pointed.] 

 attenuatum. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. attenuated.] 

 hellatula, see Isonema bellatula. 

 bellona, Hall, 1876, Illust. Devonian Foss., 



Ham. Gr. [Ety. proper name.] 

 boydi, see Murchisonia boydi. 

 carinatum, Stevens, 1858, Am. Jour. Sci., 



2d series, vol. 25, Coal Meas. [Sig. 



keeled.] 

 cerithiforme. Meek & Worthen, 1860, 



Proc. Acad. Nat. Sci., Coal Meas. 



[Sig. like a shell of the genus Cerith- 



ium.'] 

 coaptum. Hall, 1876,Illust.DevonianFoss., 



Ham. Gr. [Sig. closely-joined.] 

 compactum. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. [Sig. compact.] 

 danvillense, Stevens, 1858, Am. Jour. 



Sci., vol. 25, Coal Meas. [Ety. proper 



name.] 

 delphicola. Hall, 1862, 15th Reg. Rep., 



Ham. Gr. [Ety. mythological name.] 

 fasciatum. King, 1850, Permian Foss., 



. Permian Gr. [Sig. banded.] 

 fitchi. Hall, 1859, Pal. N. Y., vol. 3, Low. 



Held. Gr. [Ety. proper name.] 

 halli, Norwood & Pratten, 1855, Jour. 



Acad. Nat. Sci., 2d series, vol. 3, Coal 



Meas. [Ety. proper name.] 

 hamiltonise. Hall, 1862, 15th Reg. Rep., 



Ham. Gr. [Ety. proper name.] 

 hydraulicum, Hall, 1872, 24th Reg. Rep., 



Ham. Gr. [Ety. from the hydraulic 



limestone.] 

 inornata, see Polyphemopsis inornata. 

 leda, Hall, 1868, 20th Reg. Rep. N. Y., 



Niagara Gr. [Ety. mythological name.] 

 minutum, Stevens, 1858, Am. Jour. Sci., 



2d series, vol. 25, Coal Meas. [Sig. 



minute.] 

 multicostatum. Meek & Worthen, 1861, 



Proc. Acad. Nat. Sci., Coal Meas. [Sig. 



many-ribbed.] 

 murrayanum, Salter, 1859,Can.Org.Rem., 



Decade 1 , Black Riv. Gr. [Ety. proper 



name.] 

 newberryi, see Macrocheilus newberryi. 

 nexile, Phillips, 1841, Pal. Foss., Ham. 



Gr. [Sig. interlaced.] American 



species. (?) 

 nitidula, see Polyphemopsis nitidula. 



nodosum, Stevens, 1858, Am. Jour. Sci., 2d 



ser., vol. 25, Coal Meas. [Sig. knotted.] 

 obtusum. Hall, 1859, Pal. N. Y., vol. 3, 



Low. Held Gr. [Sig. obtuse.] 

 oligospiratum, Winchell, 1863, Proc.Acad. 



Nat. Sci., Chemung Gr. [Sig. having 



few whorls.] 

 pexatum. Hall, 1861, 14th Reg. Rep., Up. 



Held Gr. [Sig. clothed in a shell with 



a nap on it.] 

 pexatum var. obsoletum, Hall, 1876,Illust. 



Devonian Foss., Up. Held. Gr. [Sig. 



obsolete.] 

 planogyratum, Hall, 1839, Pal. N.Y., vol.3. 



Low. Held. Gr. [Sig. flattened whorl ; 



from the flattening of the upper side 



of the last volution.] 

 politum, Stevens, 1858, Am. Jour. Sci., 2d 



series, vol. 25, Coal Meas. [Sig. 



smoothed.] 

 regulare. Cox, 1857, Geo. Sur. Ky., vol. 3, 



Coal Meas. [Sig. regular.] 

 robustum, Hall, 1862, 15th Reg. Rep.,Scho- 



harie grit. [Sig. robust.] 

 rugosum. Meek & Worthen, 1860, Proc. 



Acad. Nat. Sci., Coal Meas. [Sig. 



wrinkled.] 

 scitula. Meek & Worthen, 1860, Proc. 



Acad. Nat, Sci., Coal Meas. [Sig. 



neat, pretty.] 

 semicostatum. Meek, 1871, Proc.Aca. Nat. 



Sci., Coal Meas. [Sig. half-ribbed.] 

 solidum. Hall, 1862, 15th Reg. Rep., Scho- 

 harie grit. [Sig. sohd.] 

 styliola. Hall, 1876, Illust. Devon. Foss., 



Chemung Gr. [Sig. a truncated 



column.] 

 subattenuatum, Hall, 1862,15th Reg. Rep., 



Schoharie grit. [Sig. somewhat atten- 

 uated.] 

 suhulata, see Murchisonia subulata. 

 tenuicarinatum, Stevens, 1858, Am. Jour. 



Sci., 2nd series, vol. 25, Coal Meas. 



[Sig. fine-lined.] 

 terebra, Hall, 1876, Illust. Devon. Foss., 



Chemung Gr. [Sig. an auger.] 

 teres. Hall, 1876, Illust. Devonian Foss., 



Corniferous Gr. [Sig. well-rounded.] 

 turritiformie. Hall, 1860, 13th Reg. Rep. 



N. Y., Ham. Gr. [Sig. tower-like.] 

 vincta, Hall, 1858, Trans. Alb. Inst., vol. 



4, Warsaw Gr. [Sig. girded.] 

 yandellanum. Hall, 1858, Trans. Alb. Inst. 



vol. 4, Warsaw Gr. [Ety. proper name.] 

 Maclurea, LeSueur, 1818,(Maclurites) Jour. 



Acad. Nat. Sci., vol. 1. [Ety. proper 

 name.] 

 acuminata, Billings, 1865, Pal. Foss., vol. 



1, Quebec Gr. [Sig. pointed.-] 

 aflinis, Billings, 1865, Pal. Foss., vol. 1, 



Quebec. Gr. [Sig. near to.] 

 atlantica, Billings, 1859, Can. Nat. & Geo., 

 vol. 4, Chazy Gr. [Ety. proper name.] 

 bigsbyi. Hall, 1861, Geo. Rep. Wis., Tren- 

 ton Gr. [Ety. proper name.] 

 crenulata, Billings, 1865, Pal. Foss., vol. 

 1, Quebec Gr. [Sig. crenulated.] 



