Conchifera. 218 Papyridea. 



Cornueliana, d'Orb. Sp. (Cardium), Gabb, 1861. Fr. L. G., N. 

 aequivalvis, Goldf. Sp. (Corbula), Gabb, 1861. G., Fr., India. C. 

 *elegantula, Roem. Sp. (Cardium), Gabb, 1861. Tex., N. J., 



Ala., Miss. C 



Subdinnensis, d'Orb. Sp. (Cardium), Gabb, 1861. Fr U. G, 



Pectunculus, Lam. 1801 (AXINAEA, Poli, 1791). 



alternatus, d'Orb. (Axinaea), P. F. 188, 306, 7-11. 

 auslralis, Morton, not Quoy. 1833 (A. subaustralis), Syn. 



1834, p. 64. 

 Bourgeoisianits, d'Orb. (Axinaea), Prod. 196. 

 hrevirostriSj Reuss (A. Reussii), Bohra. Kreid. 9, 35, 12. 

 clavus, Sow. (Axinaea), G. T. vol. iii, pi. 38, f. 2. 

 decussatus, Roem. (A. subdecussata), Nord. Kreid. p. 69. 

 Geimtzii, d'Orb. (Axinaea), Prod. 196. 

 hamiila, Morton (Axinaea), Syn. Cret. 64, 15, 7. 

 Boenhif/hausii, Mull. (LiMOPSis), Aach. Kreid. 18, 1, 6. 

 Heherianus, P. & R. (Axinaea), Env. Genev. 468, 38, 5. 

 inscidptiis, Reuss (Axinaea), Bohm. Kreid. 8, 35, 5. 

 laevis, Gein. not Sow. (A. Geinitzii), Charakt. Kreid. 

 lens, Nilss. (Axinaea), Petrif. Suec. pi. 5, f. 4. 

 Marrotkinus, d'Orb. (Axinaea), P. F. 192, 307, 13, 16. 

 Marullensis, Leym. (Axinaea), M. G. S. F. vol. vii, pi. 9, f. 2. 

 ohsoletus, Goldf. (A. sublaevis), P. Germ. pi. 126, f. 4. 

 planus, Roem. (A. clava), Nord. K. 69, 8, 24. 

 Eenauxlanus, d'Orb. (Axinaea), P. F. 191, 307, 7-12. 

 Requlenmmts, d'Orb. (Axinaea), P. F. 190, 307, 1-6. 

 reticulatus, Reuss (Axinaea), Bohm. Kreid. 8, 35, 7-8. 

 Reussii, d'Orb. (Axinaea), Prod. 164. 

 Siouxensis, H. & M. (Axinaea), 1855, Mem. Acad. Bost. 2d 



s. vol. v, 381, 1, 12. 

 spinescens, Reuss (Axinaea), B. Kreid. 9, 35, 6. 

 suhauriculatns, Forbes (Axinaea), G. T. vol. vii, 150, 17, 13. 

 subconcentricus, Lam. (Axinaea), Anim. S. Vert. vol. vi, p. 56. 



* I place this species in this genus, because Mr. Conrad has informed me that 

 it has the hinge of a true Papyridka, and not that of Pholadomva, as believed 

 by d'Orbigny. Specimens found in the "Ripley Group,'' a deposit resembling 

 somewhat the Speeton Clay of England in its lithological characters, have enabled 

 him to ascertain without doubt the true generic relations of these beautiful shells. 



