LAMELLIBRANCHIATA. 



longispina, Hall, 1843, (Avicula longi- 



spina) Geo. Rep. 4th Dist. N.Y., Ham. 



and Chemung Gr. [Sig. long-spined.] 

 modiolaris, see Modiolopsis modiolaris. 

 morganensis, see Avicula morganensis. 

 orbicularis, see Ambonychia orbicularis. 

 pholadis, see Orthonota pholadis. 

 planulata, see Cypricardinia planulata. 

 prolifica, Billings, 1866, Catal. Sil. Foss. 



Antic, Hud. Riv. Gr. [Sig. abundant.] 

 protexta, Conrad, 1842,( Avicula protexta) 



Jour. Acad. Nat. Sci., vol. 8, Chemung 



Gr. [Sig. closely- woven.] 

 punctulata, Conrad, 1838, Ann. Rep. N. 



Y., Ham. Gr. [Sig. marked with 



small dots.] 

 pygmsea, see Cypricardinia pygmsea. 

 quadrula, Conrad, 1842, (Avicula quad- 



rula) Jour. Acad. Nat. Sci., vol. 8, 



Ham. Gr. [Sig. a small square.] 

 radians, see Monotis radians, 

 revoluta, Winchell & Marcy, 1865, Mem. 



Bost. Soc. Nat. Hist., Niagara Gr. [Sig. 



curled back.] 

 striato-costata, McChesney, 1861, (Am- 

 bonychia strieecosta) New Pal. Foss., 



Niagara Gr. [Sig. striated and ribbed. ] 

 suborbicularis, see Aviculopecten suborbi- 



cularis. 

 subpapyracea, Meek & Worthen, 1866, 



Proc. Chi. Acad. Sci., Ham. Gr. [Sig. 



somewhat like papyrus.] 

 thebesensis, Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, Niagara Gr. [Ety. 



proper name.] 

 thisbe, Billings, 1866, Catal. Sil. Foss. 



Antic, Anticosti Gr. [Ety. proper 



name.] 

 triquetra, see Mytilarca triquetra. 

 undata, see Ambonychia undata. 

 undulata, Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, Kinderhook Gr. [Sig. 



wavy.] 

 variostriata, Billings, 1866, Catal. Sil. 



Foss. Antic, Anticosti Gr. [Sig. va- 

 riably-lined.] 

 volans, Winchell & Marcy, 1865, Mem. 



Bost. Soc. Nat. Hist., Niagara Gr. 



[Sig. winged.] 

 Ptekonitklla, Billings, 1874, Pal. Foss., vol. 



2. [Ety. diminutive of Pteronites.] 

 curta, Bilhngs, 1874, Pal. Foss., vol. 2, 



Low. Held. Gr. [Sig. short.] 

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



Low. Held. Gr. [Sig. oblong.] 

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



Low. Held. Gr. [Sig. beautiful, 



lovely.] 

 Ptkronites, McCoy, 1844, Syn. Carb. Foss. 



Ireland. [Ety. Pteron, a wing.] 

 (?) chemungensis, Hall, 1843, Geo. Rep. 



4th Dist. N. Y., Chemung Gr. [Ety. 



proper name.] 

 decussata, Hall, 1843, (Avicula decussata) 



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



[Sig. arranged in pairs that cross each 



other.] 



gayensis, Dawson, 1868, Acad. Geo., Low. 



Carb. [Ety. proper name.] 

 lsevis, Hall, 1843, (Avicula lams) Geo. 



Rep. 4th Dist. N., Y., Ham. Gr. [Sig. 



smooth.] 

 muricatus, Hall, 1843,(Avicula muricata) 



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



[Sig. spiny like a Murex.] 

 spinigerus, Conrad, 1842, (Avicula spini- 



gera) Jour. Acad. Nat. Sci., vol. 8, 



chemung Gr. [Sig. bearing spines.] 

 subdecussata, Hall, 1877, Pal. N. Y., vol. 



5, Ham. Gr. [Sig. somewhat like 



P. decussata.'] 

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



[Ety. ptychos, a folding ; desma, a liga- 

 ment or band.] 

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



Corniferous Gr. [Ety. proper name.] 

 Pykenomceus, Hall, 1852, Pal. N. Y., vol. 2. 



[Ety. pyrenos, Nucula; omoios, similar; 



from its resemblance in general form 



to the shells of the genus Nucula.] 

 cuneatus, Hall, 1852, Pal. N. Y., vol. 2, 



Clinton Gr. [Sig. wedge-shaped.] 

 Sanguinolaria, Lamarck, 1801, Syst. An. 



sans Vert. [Ety. Sanguinolarius, hav- 

 ing blood.] 

 leptogaster, Winchell, 1863, Proc. Acad. 



Nat. Sci., Chemung Gr. [Ety. leptos, 



thin ; gaster, belly.] 

 rostrata, Winchell, 1865, Proc. Acad. Nat. 



Sci., Marshall Gr. [Sig. beaked.] 

 sectoralis, Winchell, 1862, Proc. Acad. 



Nat. Sci., Marshall Gr. [Sig. like a 



sector.] 

 septentrionalis, Winchell, 1862, Proc 



Acad. Nat. Sci., Marshall Gr. [Sig. 



northern.] 

 similis, Winchell, 1862, Proc. Acad. Nat. 



Sci., Marshall Gr. [Sig. similar.] 

 Sanguinolites, McCoy, 1844, Synop. Carb. 



Foss. Ireland. [Ety. Sanguinolaria, 



a genus of shells ; lithos, stone.] 

 acutus, Hall, 1870, Prelim. Notice Lam. 



shells, Ham. Gr. [Sig. acute.] 

 seolus, Hall, 1870, Prelim. Notice Lam. 



shells, Waverly Gr. [Ety. mytho- 

 logical name.] 

 amygdalinus, Winchell, 1863, Proc. Acad. 



Nat. Sci., Chemung Gr. [Sig. like an 



almond.] 

 arcsefornris, Hall, 1870, Prelim. Notice 



Lam. shells, Ham. Gr. [Sig. like a 



shell of the genus Area.] 

 borealis, Winchell, 1862, Proc. Acad. Nat. 



Sci., Marshall Gr. [Sig. northern.] 

 carinatus, Conrad, 1841, (Cypricardites 



carinata) Ann. Rep. N. Y., Ham. Gr. 



[Sig. carinated.] 

 chemungensis, Vanuxem, 1842, (Cypri- 

 cardites chemungensis) Geo. Rep. N. 



Y., ChemungGr. [Ety. proper name.] 

 clavulus, Hall, 1870, Prelim. Notice Lam. 



shells, Chemung Gr. [Sig. a small 



nail.] 



