4 
and 5. P. Ipsviciensis, Valencienn. l. c. 28 and 36. M. 
C. 611 . /. 3 and 4. 
4. P. reflexa (Say). Philadel. Journal ,4. 153. pi. 13./ 4. 
Valenc. 1. c. 26. P. Americana, Wagner. Bronn. Leth. 974. 
5. P. Menardi (Besh.). P. Faujasii, Basterot Mem. de la 
Soc. d' Hist, Nat. 2. 95. P. Menardi, Dujardin , Mem. 
de la Soc. GeoL de France , vol. II, 255. Bronn. Lethrea , 
974. P. Basteroti, Valenc. 1. c. 22 and 35. p/. 6./. 2. c/6. 
6. P. gentilis, M. C. 610./ 1. 
7. P. Rudolphii (Eichwald). Panopsea Faujasii, Du Bois 
Conch. Foss. Wolhyni-podolien. 51. pi. 4. /. 1 — 4. P. 
Rudolphii, Eichwald , Naturh-Scizse 204. Valenc. 1. c. 
24 and 35. jo/. 5./. 1. «. 6. 
8. P. intermedia (M. C.). Mya intermedia, M. C. 76. / 1. 
and 419./ 2. Panopsea intermedia, M. C.u. 6. 211. 2. 602. 
/. 4. Corbula dubia, Deshapes Cocquilles de Paris, V. 
I. 59. pi. 9./ 13 //wc? 14. P. Deshayesii, Valenc. 1. c. 20 
and 35.pl. 4./. 2. «. 6. 
9. P. plicata, M. C. 419./ 3. P. Deshayesii var. Valenc. 
1. c. 20 and 35. 
10. P. Sowerbyi, Valenc. 1. c. 27 and 36. P. Faujasii, 
M. C. 602./ 1. 2. 
11. P. oblata (M. C. Index). Mya gibbosa, M. C. t. 419. 
f I* 
12. P. gibbosa (M. C.). Lutraria gibbosa, M. C. t. 42. 
Panopsea gibbosa, M. C. vol . 6. 211. Panopsea Agassizii, 
Valenciennes , l. c. 31. 
13. P. subsinuosa, Valenc. L c. 31. 
14. P. Norvegica, M. C. supra vol. 7. 1. 610. 611. 
15. P. ? abrupta (Valenc.). Pholadomya abrupta, Conrad 
Fossil Shells of N. America , v. 1 ,t. 12. P. abrupta, Valenc. 
1. c. 28. 
16. P. ? margaritacea (Valenc.). Glycimeris margaritacea, 
Earn. Hist. Nat. v. 5. 458. Clavagella Lodoisca, Caillat 
Ann. Soc. des Sciences de Seine et Oise, pi. 9. f 9. Lam. 
Hist. Nat. ed. 2. v. 6. 68. note. Panopsea margaritacea, 
Valenc. 1. c. 29 and 35. pi. b.f 2. a. h. 
Of the above P. Aldrovandi and P. Norvegica are also 
found living, the first in the Mediterranean Sea, and the 
latter in the Northern Ocean. Three other living species 
are described besides these. 
