484 



LAMELLIBRANCHIA TA. 



[LED. I.EP. 



is an existing littoral genus that bur- 

 rows in the sand. It is not known in 

 the Palaeozoic rocks. 



(?) curia, Shumard, 1858, Trans. St. Louis 

 Acad. Nat. Sci., vol. 1, p. 206, Cho- 

 teau Gr. 



Jennie, Winchell, 1863, Proc. Acad. Nat. 

 Sci., p. 17, Marshall Gr. 



unicmiformis, see Edmondia unioniformis. 

 Leda, Schumacher, 1817, syn. for Nuculana. 



barrisi, White & Whitfield, syn. for Palaeo- 

 neilo nuculiformis. 



bellistriaia, see Nuculana bellistriata. 



breviroslris, see Nuculana brevirostris. 



curta, see Nuculana curta. 



dem-mamillata, see Nuculana dens-mam- 

 illata. 



gibbosa, see Yoldia gibbosa. 



knoxensis, see Yoldia knoxensis, 



levistriata, see Yoldia levistriata. 



nuculifarmis, see Palseoneilo nuculiformis. 



obscure, see Nuculana obscura. 



ohioensis, Hall, syn for Nuculana pandori- 

 formis. 



oweni, see Yoldia oweni. 



pandoriformis, see Nuculana pandori- 

 formis. 



polita, see Nuculana polita. 



rushensis, see Yoldia rushensis. 



saccata, see Nuculana saccata. 



substitute, see Yoldia subscitula. 

 LIOPTERIA, Hall, 1883, Pal. N. Y., vol. 5, 

 pt. 1, p. 4. (Plates and Explanations.) 

 [Ety. leios, smooth ; Pteria, a genus.] 

 Aviculoid, resembling in form Actinop- 

 teria ; anterior extremity auriculate ; 

 wing large, extremity produced; test 

 without proper rays ; ligament ex- 

 ternal; ligamental area marked by 

 fine parallel longitudinal striae ; hinge 

 with one or two oblique, slender, 

 lateral teeth ; the cavity of the beak 

 partially separated from the anterior end 

 by a short partition. Type L. dekayi. 



bigsbyi, Hall, 1883, Pal. N. Y., vol. 5, pt. 

 1, p. 165, Ham. Gr. 



chemungensis, Vanuxem, 1842, (Avicula 

 chemungensis,) Geo. Rep. 3d Dist. N. Y., 

 p. 182, and Paj, N. Y., vol. 5, p. 172, 

 Chemung Gr. 



conradi, Hall, 1883, Pal. N. Y., vol. 5, pt. 

 1, p. 159, Ham. Gr 



dekayi, Hall, 

 1883, Pal. N.Y., 

 vol. 5, pt. 1, p. 

 164, Ham. Gr. 

 gabbi, Hall, 1884, 

 Pal. N. Y., vol. 

 *>, pt. 1, p. 169, 

 Ham. Gr. 

 greeni, Hall, 1883, 

 Pal. N. Y., vol. 



>FiG. 835. Llopteria de- Wa'm' C? ' 



kayl. Cnst showing ver- , ". a m T ' T , T' 

 tical plate anterior to Isevis, Hall, 1843, 

 the beaks. (Aviculalaevis,) 



Geo. Rep. 4th 



Dist. N. Y., P . 181, and Pal. N. Y., vol. 

 5, p. 158, Marcellus Shale. 



leai, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, p. 



168, Ham. Gr. 

 linguiformis, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 173, Chemung Gr. 

 mitchelli, Hall, 1883, Pal. N. Y., vol. 5, 



pt. 1, p. 166, Ham. Gr. 

 nitida, Hall, 1883, syn. for L. chemung- 



oweni, Hall, 1883, Pal. N. Y., vol. 5, pt. 1, p. 

 170, Ham. Gr. ^^ 



rafinesquii,Hall, 



1883, Pal. N. 

 Y., vol. 5, pt. 

 1, p. 161, Ham. 

 Gr. 



sayi, Hall, 1884, 

 Pal. N. Y., vol. 

 5 pt.} p. 162, 

 Ham. Gr. 



torreyi, Hall, 



1884, Pal. N.Y.; 



I>iopteria rafin- 

 es( * uii - 



vol. 5, pt. 1, p. 174, Chemung Gr. 

 troosti, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 167, Ham. Gr. 

 LEPTODESMA, Hall, 1883, Pal. N. Y., vol. 5, 



pt. 1, p. 4. (Plates and Explanations.) 



[Ety. leptos, slender ; desma, a ligament.] 



Like Liopteria, except the anterior end 



is nasute and acute, instead of auricu- 



late and rounded ; hinge-line narrow, 



with a slender, lateral tooth posterior 



to the beak; ligament external; test 



with concentric striae. Type L. potens. 

 acutirostrum, Hall, 1884, Pal. N. Y., vol. 



5, pt. 1, p. 234, Chemung Gr. 

 agassizi, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 182, Chemung Gr. 

 alatum, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 218, Chemung Gr. 

 aliforme, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 220, Chemung Gr. 

 arciforme, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 229, Chemung Gr. 

 aviforme, Hall, 1884, Pal. N. Y., vol. 5,pt. 



1, p. 224, Cbemung Gr. 

 becki, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 185, Chemung Gr. 

 billingsi, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 192, Chemung Gr. 

 biton, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 222, Chemung Gr. 

 cadmus, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 201, Chemung Gr. 

 clitus, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 210, Chemung Gr. 

 complanatum, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 227, Chemung Gr. 

 corydon, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 212, Chemung Gr. 

 creon, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 202, Chemung Gr. 

 curvatum, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 196, Up. Chemung Gr. 

 demus, Hall 1884, Pal. N. Y., vol. 5, pt. 



1, p. 203, Chemung Gr. 

 disparile, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 186, Up. Chemung Gr. 

 extenuatum, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 207, Chemung Gr. 



