32 Lyonna. TERRAINS PALÉOZOIQUES, 



Silur. Syst., pi. 6, fig'. 1 (iiun riotundala, Phill., 1835). Anglclerre, 

 Aympsirv-limestone. 



84. rigida, d'Orb. , 1847. Tsammohia rigida, Sow. , 1839, in 

 Murch. .Siliir. Syst., pi. 8, lig. 3. Angleterre, Ludlow-Rock. 



85. amyg'dalîna, ri'Orb. , 1847. Cypricardia amygdalina , Sow., 

 1839, iii Miircli. Silur. Syst., pi. 5, ûg. 2. Angleterre, Ludlow. 



86. impressa, d'Oib., 1847. Cypricardia impressa, Sow., 1839, in 

 Miiicli. Silur. Syst., pi. 5, fig. 3. Angleterre, Ludlow Rock. 



Sî. niidala, d'Orb. , 1847. Cypricardia undata, Sow. 1839. In 

 Murcli. Silur. Syst., pi. 5. fig. 4. Anglet' rre, Luduw Rock. 



88. retusa, d'Orb., 1847. Cypricardiaretusa,8ovi., 1839, in Murch., 

 Silur. Sy~i., pi. 5, flg. 5. Anglpierre, Ludlow-Rock 



89. semisulctta, d'Oi b., 1847. Modiola semisulcata, Sow., 1839, in 

 Murch. Silur. Syst., pi. 8, fig. 6. Angleterre, Ludlow Rock. 



90. antiqua, d'Orb., 1847. Modiola antiqua, Sow., 1839, in Murch. 

 Silur. Syst., pi. 13, fig. 1. Angleterre, Wenlock-shale. 



91. otisoleta, d'Orb., 1847. Cypricardia o6so/eta, Hall, 1843. Natii- 

 ral hist. of New-York, n° 7, fig. 3. Etats-Unis, New-York, Clinton 

 group, Wolcott in Wayne counly. 



93. alata, d'Orb., 1847. Cypricardia alata, Hall, 1843. Natur. hist. 

 of New-York, n" 2, fig. 3. Unio primigenius , Conrad, Geol. Rep., 

 1839, p. 66. Etats-Unis, New-York, Medina-sandstone. 



ORTHOCONQUES INTÉGROPALLÉ.\LES. (d'Orb.) 



CYPRICARDIA, Lamarck, 1801. 



93. soleiioides, Sow., 1839, in Murch. Silur. Syst., pi. 8, fig. 2, 



Anyleierre, Ludlow-Rock. 

 94:. cymliseformis, Var., Sow., 1839, in Murch. , Silur. Sysf., 



pi. 5, (iii. 6. Angleterre, Ludlow-Rock. 



95. orthonota, Hall, 1843. Nalur. hist. of New-York, n" 2, fig. 8, 9. 

 Unio orthonota, Conrad, Geol. Kep. , 1839, p. 66. Etats-Unis, New- 

 York, Médina. 



96. ciirta, d'Orb., 1847. Orthonota curta, Hall, 1843. Natur. hist. 

 of New-York, n" 7, fig. 1. Etals-Unis, Wayne (contrée). 



XCEGAIiOBOMT , Sow., 1827. 



9'S'. carponiorpliuni, d'Orb., 1847. Cardium carpomorphum , Dal- 



inanii, Hisinger, Letlî. suecica, pi. 19, fig. 5. Suède, Goihland. 

 CARDIOTIA, Agassiz, 1838. Sinemuria, de Cristol, 1839. Pachijodon, 



Stucth. 



98. coinplanata , 18^7, Pullastra complanala , Sow., 1839, in 

 Murch. Silur. Sy-t., pi. 5, fig. 7. Angleterre, Ludlow-Rock. 



99. ang^usta, d'Orb., 1847. Cypricardia angusta, Hall, 1843. Natur. 

 hist. uf New-York, n" 7, fig. 6. Etats-Unis, New-York, Clinton 

 group, Wolcott in AVayne counly. 



100. macheerieforiuis, d'Orb. Nucula machrœfoncmis. Hall, 1843. 

 Natur. bisi. ot Nuw-York, n» 7, fig. 2. Etals-Unis, New-York, Clinton 

 group, Wolcott in Wayne counly. 



