116 



BEACHIOPODA. 



rostrata, Hall, 1843, (Atrypa rostrata) 



Geo. Rep. 4th Dist. N. Y., Ham. Gr. 



& TuUy limestone. [Slg. beaked.] 

 scitula. Hall, 1843, (Atrypa scitula) Geo. 



4th Dist. N. Y., Corniferous Gr. Prof. 



Hall regards Charionella circe as a 



syn. for this species. [Sig. pretty.] 

 umbonata, Billings, 1862, (Athyris um- 



bonata) Pal. Foss., vol. 1, Mid. Sil. 



[Sig. protuberant.] 

 unisulcata, Conrad, 1841, (Atrypa uni- 



sulcata) Ann. Kep. N. Y., Up. Held. 



& Ham. Gr. [Sig. having one de- 

 pression.] 

 Meristina, Hall, 1867, 20th Eeg. Rep. N. \. 



[Ety. Merista, a genus of shells ; iiin.i, 



implying resemblance.] 

 maria. Hall, 1863, (Meristella maria) 



Trans. Alb. Inst., vol. 4, Niagara Gr. 



[Ety. proper name.] 

 nitida. Hall, 1852, (Atrypa nitida) Pal. 



N. Y., vol. 2, Niagara Gr. [Sig. 



smooth.] 

 nitida var. oblata. Hall, 1852, (Atrvpa 



nidita var. oblata) Pal. N. Y., vol. 2, 



Niagara Gr. [(Sig. oblate.] 

 MoNOMERELLA, Billlngs, 1861, Can. Nat. & 



Geo., vol. 6. [Ety. monos, one ; meros, 



apart; c/fa, diminutive termination.] 

 newberryi. Hall & Whitfield, 1875, Ohio 



Pal., vol. 2, Niagara Gr. [Ety. proper 



name.] 

 orbicularis, Billings, 1871, Can. Nat, vol. 



6, Guelph Gr. [Sig. orbicular.'} 

 prisca, Billings, 1871, Can. Nat. & Geol., 



vol. 6, Guelph Gr. [Sig. ancient.] 

 NucLEOspiRA, Hall, 1859, Pal. N. Y'., vol. 3. 



[Ety. nucleus, a kernel ; spira, aspire.] 

 barrisi, AVhite, 1860, Bost. Jour. Nat. 



Hist., Kinderhook Gr. [Ety. proper 



name.] 

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



Low. Held. Gr. [Sig. concentrically 



lined.] 

 concinna. Hall, 1843, (Atrypa concinna) 



Geo. 4th Dist. N. Y., Hamilton Gr. 



[Sig. handsome.] 

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



Low. Held. Gr. [Sig. elegant.] 

 pisiformis. Hall, 18.59,(Orthis pisum, 1851, 



Pal. N. Y^, vol. 2,) Pal. N. Y., vol. 3, 



Niagara Gr. [Ety. from its resem- 

 blance to iSpirifcr pimim of Murchiscm.] 

 ventricosa. Hall, "1859, Pal. N. Y., vol. 3, 



Low. Held. Gr. This species was first 



described in 1856, in 9th Reg. Rep., as 



Spirifera renlricvsci. [Sig. bulging out.] 

 Obolella, Billings, 1861, Pal. Foss., vol. 1. 



[Ety. diminutive of Obolus, a small 



Greek coin.] 

 cselata. Hall, 1847, (Orbicula cfelata) Pal. 



N. Y., vol. 1, Hud. Riv. Gr. [Sig. 



sculptured.] 

 chromatica, Billings, 1861, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. colored.] 

 cingulata, Billings, 1861, Pal. Foss., vol. 



1, Potsdam Gr. [Sig. encircled with 



lines.] 



circe, Billings, 1871, Can. Nat. and GeoL, 



Potsdam Gr. [Ety. mythological 



name.] 

 crassa. Hall, 1847, (Orbicula crassa) Pal. 



N. Y'., vol. 1, Hud. Riv. Gr. [Sig. 



thick.] 

 desiderata, Billings, 1862, Pal. Foss., vol. 



1, Quebec Gr. [Sig. rare.] 

 desquamata. Hall, 1847, (Avicula desqua- 



mata) Pal. N. Y., vol. l,Hud. Riv.Gr. 



[Sig. scaled off.] 

 gemma, Billings, 1871, Can. Nat. & Geol., 



Potsdam Gr. [Sig. a young bud.] 

 Ida, Billings, 1862, Pal. Foss., vol. 1, Que- 

 bec Gr. [Ety. mythological name.] 

 miser, Billings, 1874, Pal. Foss., vol. 2, 



Low. Potsdam Gr. [Sig. paltry.] 

 nana, i\Ieek & Hayden, 1861, Proc. Acad. 



Nat. Sci. Phil", Potsdam Gr. [Sig. 



dwarfish.] 

 nitida. Ford, 1863, Am. .Jour. Sci. & Arts, 



3rd ser., vol. 5, Low. Potsdam Gr. 



[Sig. neat.] 

 polita. Hall, 1861, Geo. Rep. Wis., (Lin- 



gula polita) Potsdam Gr. [Sig. 



smoothed.] 

 pretiosa, Billings, 1862, Pal. Foss., vol. 1, 



Quebec Gr. [Sig. valuable, precious.] 

 transversa, Hartt, 1868, Acad. Geol., St. 



John's Gr. [Ety. from the trans- 

 versely oval form.] 

 ObolelUna, Billings, Dec, 1871, syn. for Din- 



obolus. 

 canadensh, see Dinobolus canadensis. 

 galtensia, see Dinobolus galtensis. 

 magmfica, see Dinobolus magnificus. 

 Obolus, Eichwald, 1829, Zoologia .Specialis, 



vol. 1. [Ety. obolus, a small coin.] 

 cauachiixK, see 1 >inobolus canadensis. 

 conradi, see Dinobolus conradi. 

 yaltensis, see Trimerella galtensis. 

 labradoricu-i, see Iphidea labradorica. 

 (?) murrayi, Billings, 1865, Pal. Foss., 



vol. 1, Quebec Gr. [Ety. proper 



name.] 

 Orbicula, Cuvier, 1808, syn. for Crania. 

 nrlata, see Obolella cselata, 

 cancellata, see Trematis cancellata. 

 corriigatn, see Crania corrugata. 

 craxm, see Obolella crassa. 

 deformuta, see C'rania deformata. 

 e.rci'ntrica, see Crania excentrica. 

 filosa, see Schizocrania filosa. 

 graiulix, see Discina grandis. 

 lamellosa, see Discina lamellosa. 

 lodensia, see Discina lodensis. 

 minitla, see Discina minuta. 

 nitida, see Discina nitida. 

 prima,^ see Crania prima. 

 quadricoslatn, see Crania quadricostata. 

 squamifomm, see Pholidops squamiformis. 

 sublruncntii, see Pholidops subtruncatus. 

 tenuilamdlata, see Crania tenuilamellata. 

 trrmlnalis, see Trematis terminalis. 

 truncata, see Crania truncata. 

 Orthis, Dalman, 1827, Kongl. Vet. Acad. 



Handl. [Ety. ortiios, straight, in allu- 

 sion to the straight hinge line.] 



