4 
GEOLOGY. 
Fig. 3. M^eonia elongata, natural size; a , b, c, different views. 
— p. 695, 
Fig. 4. M-Eonia valid a, cast, natural size; a, b, anterior mus- 
cular impressions, different sides. — p. 695. 
Fig. 5. MiEONiA axinia ; a, b, interior cast, natural size ; c, 
smaller anterior muscular impressions from cast, much enlarged ; 
two anterior muscular impressions, natural size ; d, probably same 
species, exterior cast. — p. 696. 
PLATE 6. 
Fig. 1. a, b, MjEonia carinata, different views of one valve, 
natural size. — p. 696. 
Fig. 2. MiEONiA eragilis, broken specimen, natural size. Fig. 
3, same, smaller specimen. — p. 696. 
Fig. 4. a, MiEONiA myiformis, interior cast, natural size; b, 
front view ; c, hinge surface. — p. 697. 
Fig. 5. a, M^eonia elliptica, natural size; b , c, other views. — 
p. 697. 
Fig. 6. 6 a, M^onia elliptica, interior cast of a large spe- 
cimen. 
Fig. 7. MiEONiA grandis, natural size; 7 «, outline of one 
valve, front view. — p. 697. 
Fig. 8. MiEONiA grandis, smaller specimen; 8 a, end view, 
valves dislocated. 
PLATE 7. 
Fig. 1. M^eonia gracilis, natural size; a, lateral view ; b, dorsal 
view; c, end view. — p. 698. 
Fig. 2. MiEONiA ? recta, lateral view, natural size, shell broken 
in front. — p. 698. 
Fig. 3. Nucula abrupta, side view of cast; a, cast of posterior 
muscular impression. — p. 698. 
Fig. 4. Nucula concinna, imperfect, natural size. — p. 699. 
Fig. 5. Nucula glendonensis, natural size. — p. 699. 
Fig. 6. Eurydesma elliptica, a, b, c, d , different views, natural 
size. — p. 700. 
Fig. 7. Eurydesma globosa, side view, natural size; 7 a, end 
view. — p. 700. 
Fig. 8. Eurydesma sacculus, natural size; a, cast, imperfect; 
b, end view of same ; c, dorsal part of valve, showing back view 
of beak portion ; d, profile of vertical section of valve ; e, under 
view of hinge portion of shell. — p. 700. 
PLATE 8. 
Fig. 1. Eurydesma cordata, natural size; a, dorsal view. — 
p. 700. 
Fig. 2. Cardium australe, natural size. — p. 701. 
Fig. 3. Cardium ? ferox, part of shell, and external cast of a 
portion of same, natural size ; a, b, internal cast of corresponding 
portion. — p. 701. 
Fig. 4. Cypricardia acutifrons ; a, b, natural size. — p. 702. 
Fig. 5. Cypricardia imbricata, enlarged one-sixth. — p. 702. 
Figs. 6, 7. Cypricardia imbricata ? natural size. — p. 702. 
Fig. 8. Cypricardia arcodes ; a, b, natural size. — p. 702. 
Fig. 9. Cypricardia , internal cast, imperfect, natural size. 
— p. 703. 
Fig. 10. Cypricardia pr^erupta, natural size. — p. 703. 
PLATE 9. 
Fig. 1. Cypricardia siliqua ; a, b, natural size. — p. 703. 
Fig. 2. Cypricardia simplex, natural size. — p. 703. 
Fig. 3. Cypricardia (AviculaT) veneris; a, b, natural size. — 
p. 704. 
Fig. 4. Avicula volgensis, imperfect, natural size. — p. 704. 
Fig. 5. Pecten comptus, natural size. — p. 704. 
Fig. 6. Pecten leniusculus ; a, b, natural size. — p. 704. 
Fig. 7. Pecten tenuicollis ; a, section of surface. — p. 705. 
Fig. 8. Pecten mitis ; a, b, natural size. — p. 705. 
Fig. 9. Pecten illawarrensis, natural size; a, section of sur- 
face. — p. 705. 
Figs. 10, 11, 12. . — p. 705. 
Fig. 13. Pileopsis tenella; a, b, natural size. — p. 706. 
Fig. 14. Pileopsis alta; a, b, natural size. — p. 706. 
Fig. 15. Pleurotomaria morrisiana, natural size, from Har- 
per’s Hill; 15 a, enlarged view of surface. 16. Illawarra speci- 
men. — p. 706. 
Fig. 17. Pleurotomaria nuda; a, b, c, natural size. — p. 706. 
PLATE 10. 
Fig. 1. Platyschisma oculus, broken and compressed specimen, 
natural size. — p. 707. 
Fig. 2. Platyschisma depressum ; a, b, casts, natural size.' — 
p. 707. 
Fig. 3. Natica ? natural size. — p. 707. 
Fig. 4. Bellerophon undulatus ; a, b, natural size. — p. 707. 
Fig. 5. Bellerophon strictus ; a, b, natural size. — p. 707. 
Fig. 6. Bellerophon micromphalus; a, b, natural size. — p. 
708. 
Fig. 7. Ti-ieca lanceolata, a, b, natural size; c, transverse 
section ; d, restored specimen. — p. 708. 
Fig. 8. Conularia inornata, natural size. — p. 709. 
Fig. 9. Conularia levigata, specimen flattened out, natural 
size; a, enlarged view of articulation. — p. 710. 
Fig. 10. Pentadia (tribrachyocrinus ? of M’Coij,) corona, 
external cast, ornate side ; a, opposite or naked side ; b, enlarged 
view of ridges; c, transverse section, showing thickness of the 
original fossil; fig. 11, another plate; fig. 12, another plate, pro- 
bably of a different species. — pp. 712, 713. 
Fig. 13. Fenestella internata, part of frond, natural size ; 
a , cast of frond, much enlarged; b, under surface of branchlet 
much enlarged, exterior removed. — p. 710. 
Fig. 14. Fenestella media, natural size; a, under surface 
enlarged. — p. 710. 
Fig. 15. Fenestella internata? a cast, natural size. — p. 710. 
P LATE 1 1. 
Fig. 1. Fenestella ampla, part of a frond, natural size; 1 a, 
inner inferior surface, enlarged. — p. 710. 
