EXPLANATION OF PLATES. 431 
FIGURE. PAGE, 
88. Solecurtus (Novaculina) constricta, Lam. China, . 134 
89. Solyma lineolatus, Conr. Cretaceous; New Jersey, . 134 
90. Prothyris Meeki, Winchell. Carboniferous; Ohio, . 133 
91, 92. Saxicava rugosa, Linn. Eur., America, Australia, 135 
93. Corbula Mediterranea, Costa. Mediterranean Sea, . 138 
94. Corbula suleata, Brug. Senegal, ; . 138 
95. Corbulamella eeczanais! Meek and Hay den. Cretaceous ; 
Montana, . : : ‘ sas 
96. Sphenia Binghami, “Turton. “Europe, j ; : . 140 
97. Poromya oranulata, Nyst. Europe, . : ‘ . 140 
98, 99. Pleurodesma Mayeri, Hoernes. Tertiary; Europe, 140 
1-3. Spheniopsis scalaris, Braun. Tertiary; Germany, . 141 
4,5. Nera ornatissima, d’Orb. Cuba, . ; ” . 141 
PLATE 106. 
6. Solen vagina, Linn. Europe, . ; 3 : . 129 
T. Solen (Solena) obliqua, Spengler. W. Indies, . . 130 
8. Ensis ensis, Linn. Atlantic Coast, U.S.; ; Europe, . 130 
9. Ensis siliqua, Linn. Europe, ; . 130 
10, 11. Cultellus cultellus, Linn. Indian Ocean, y . 131 
12. Ceratisolen leoumen, Linn. Europe, . : ; . 132 
13. Siliqua radiata, Linn. Java, : : : : . 133 
14. Legumenaia elliptica, Conr. Cretaceous; U.S.,. » LS2 
15. Macha strigillata, Linn. Mediterranean, . ‘ . 134 
16. Macha (Azor) coarctata, Gmel. Europe, . : . 134 
17. Cyrtodaria siliqua, Spengler. Newfoundland, . . 136 
18. Mya truncata, Linn. Atlantic U.S., Europe, . a di Pie 
19, 20. Mya arenaria, Linn. Atlantic U.8., Europe, i ot 
21, 22. Tugoniaanatina,Gmel. West Coast of Africa, pally 
23-25. Corbula (Potamomya) erodina, Lam. Africa? . 139 
26. Poromya quadrata, Hinds. Guadeloupe, . é . 140 
27. Cryptomya Philippinarum, A. Ad. ai aut . 142 
28. Platyodon cancellata, Conr. California, . oe 
PuaTeE 107. 
29, 30. Planopza (Gly cimeris ) sly cimeris, Born. Mediter- 
ranean Sea, F - . 136 
31. Panopza (Gly cimeris) oly cimeris, Born. aie a, adductor 
muscles; p, posterior pedal muscle ; *, renal organ ; 
f, foot, t, labial tentacles ; m, iemtins : ; . 136 
32. Cyrtodaria siliqua, Spengler. Newfoundland. Gy) ae, 
adductor muscle; p, pedal muscle; s, siphonal muscle; 
J, foot; t, labial tentacles; g, gills, much contracted 
and crumpled, . : : , ‘ : : . 186 
33-35. Pachydon obliqua, Gabb. Fossil. Pebas Group, 
Upper Amazon, ; ; : ; 3 é . 138 
