EXPLANATION OF PLATES. 449 
FIGURE. PAGE, 
18. Waldheimia australis, Dorsal valve. J, cardinai pro- 
cess; t’, dental sockets; p, hinge-plate ; s, septum; c, 
crura of the loop; /, reflected portion of the loop ; m 
quadruple adductor impression, : ; ; . 309 
19. Waldheimia australis, Ventral valve. /, foramen; d, 
deltidium ; ¢, teeth; a, single muscular impression ; 7, 
cardinal ee x“, accessory muscles; p, pedicle- 
muscles; v, position of the vent; z, attachment of 
pedicle-sheath, y F : ; : 7 . 309 
20-22. Waldheimia flavescens, Lam. Recent; Australia. . 309 
23. Waldheimia (Zeilleria) lagenalis, Schloth. Cornbrash, 
Rushdon, England, . : : : : : . 309 
PLATE 135. 
24. Waldheimia (Aulacothyris) ce aus Sowb. Mid. 
Lias ; Ilminster, England, : : : . a09 
25, 26. Centronella olans- fagea, Hall. “Devonian ; Krie Co., 
NY ‘ ; ‘ ; . 810 
27. Rensellwria ovoides, Hall. Devonian; No - 30 
28, a Terebratella Magellanica, Chemn. Cape Horn, . 311 
30-32 Terebratella (Trigonosemus) elegans, Konig. Cret. ; 
Eur., : F 2 ok 
33. Terebratella (Trigonosemus) Palissii, “Wood. Cret. ; 
Belgium, . . Sil 
34, 35. Terebratella (Lyra) lyra, Sowb. Upper Greensand; 
England, . Bee 
36. Terebratella (Lyra) neocomiensis, Orb. LL. Oret. ; 
Morteau, . : ~ oll 
37-39. Terebratella (Megerlea) truncata, Lam. Mediter., 311 
40. Terevratella (Laqueus ) Californica, Koch. Recent; Cal., 312 
43, 44. Terebratella (Kingena) lima, Defrance. Chalk; 
England. ¢, dental sockets; j, cardinal process; c¢, 
crura; d, diverging processes of loop; 7, reflected 
portion; e,third attachment of loop; s, dorsal septum, 312 
45-47. Bouchardia tulipa, Blainv. Brazil. /, foramen; a, 
adductor impression; /, loop; d,deltidium; 7, cardinal 
muscles; ¢, teeth; p, fig. 47, pedicle-muscles, fig. 46, 
hinge plate; s, septum, ; : ‘ : . $12 
48, 49. Magas pumila, Sowb. +}. Cret.; France, . . 312 
50-52. Platidea anomioides, Scacchi. Mediterranean Sea, . 512 
53, 54. Kraussina rubra, Pallas. So. Africa, . : eons 
55, 56. Stringocephalus Burtini, Defrance. Dey.; Europe. 
a,adductor; c,crura; J, loop; j, cardinal process ; 
p, hinge-plate; s, dorsal septum; ws, ventral septum; 
t, dental sockets, : 5 : ; ; ; . 313 
