Pars 2 
Pachyperna. — Crenatula. 
23 
Subgenus Pachyperaa Oppenheim. 
Deirancei De Gerville 
1838 Perna Defrancei. GoldfuB-Miinster, (76) II. p. 106, 1. 108, f. 4. 
1864 Pcerna Defrancei Deshayes (1) t. II. p. 56. 
1870 Perna Defrancei. Bayan, Terr. tert. Ven. Bull. soc. geol. de 
France. t. 27. p. 462. 
1900 Pachyperna Deirancei Oppenheim, (92) p 241. 
1904 Perna Defrancei. Dainelli, (97) p. 213. 
Mitteleocan. Depart. Ain. (Frankreich). 
laverdana Oppenheim 
1900 Pachyperna laverdana. Oppenheim, (92) p. 337 — 341. 
Unteroligocan. Venetien. 
Oppenheimi Dainelli 
1904 Pachyperna Oppenheimi. Dainelli, (97) p. 209 — 213. 
Eocan. Dalmatien. 
Genus Crenatula Lamarck. 
ariculiformis Philippi 
1887 Crenatula aviculi formis. Philippi, (31) p. 207. 
Ohile. 
