202 



LAMELLIBRANCHIATA. 



longispina, Hall, 1843, (Avicula longi- 

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

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

 modwlam, see Modiolopsis modiolaris. 

 morganerms, see Avicula morganensis. 

 orbicularis, see Ambonychia orbicularis. 

 pholadis, see Orthonota pholadis. 

 planiilata, see Cypricardinia planulata. 

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

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

 protexta, Conrad, 1842,( Avicula protextaj 

 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.] 

 pygmiea, see Cypricardinia pygmsea. 

 quadrula, Conrad, 1842, (Avicula quad- 

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

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

 radians, see INIonotis radians, 

 revoluta, Winchell & Marcy, 1865, Mem. 

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

 curled back.] 

 striato-costata, McChesney, 1861, (Am- 

 bonychia strisecosta) 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.] 

 Iriquetra, see Mytilarca triquetra. 

 urmata, see Ambonychia undata. 

 undulata. Meek & ■\\^orthen, 1868, Geo. 

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

 wa^'y.] 

 variostriata, Billings, 1866, Catal. Sil. 

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

 riably-lined.] 

 volans, Winchell & Marcy, 1865, Mem. 

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

 [Sig. winged.] 

 Pteronitella, Billings, 1874, Pal., Foss., vol. 

 2. [Ety. diminutive of Pteronites.J 

 curta, Billings, 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.] 

 Ptbbonites, McCoy, 1844, Syn. Carb. Foss. 

 Ireland. [Ety. Pteron, a wiii?g.] 

 (?) 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.] 

 Isevis, Hall, 1843, (Avicula Isevis) 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.] 

 Pyrenomceus, 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, HaU, 1852, Pal. N. Y., vol. 2, 

 Clinton Gr. [Sig. wedge-shaped.] 

 Sanguinolaria, Lamarck, 1801, Syst. An. 

 sans Vert. [Ety. Sanguiiiolanus, 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 ; litfios, stone.] 

 acutus. Hall, 1870, Prelim. Notice Lam. 



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

 Eeolus, 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.] 

 arcseformis. Hall, 1870, Prelim. Notice 

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

 shell of the genus Area.] 

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



Sci., l\Iarshall 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.] 



