428 
Plate LXXIII. 
Fig. 12. —-Gythere dictyon, G. S. Brady. Left valve of a youthful form, 
and well preserved. Mallee bore No. 9, 315-325 feet, x 40. 
13. — G. dictyon, G.S.B. Bight valve of senile form, with smoother 
and thicker carapace. Mallee bore No. 11,438-440 feet, x 40. 
14. — Gythere flexicostata, Chapm. a, right valve ; b, profile of 
valve seen from above. Mallee bore No. 10,310-320 feet, x 52. 
15. — Gythere lactea. —G. S. Brady. Bight valve. Mallee bore 
No. 11, 562-564 feet, x 40. 
16. — Gythere lepralioides, G. S. Brady. Bight valve. Mallee bore 
No. 8, 210-219 feet, x 52. 
17. — Gythere lubbockiana, G. S. Brady. Bight valve. Mallee bore 
No. 11, 260-265 feet, x 53. 
18. — Gythere militaris, G. S. Brady sp. Bight valve. Mallee bore 
No. 9, 256-263 feet, x 52. 
19. — Gythere normani, G. S. Brady. Bight valve. Mallee bore 
No. 10, 310-320 feet, x 40. 
20. — Gythere obtusalata, G. S. Brady. Bight valve. Mallee bore 
No. 9, 256-263 feet, x 52. 
21. — Gythere ovalis , G. S. Brady. Left valve. Mallee bore No. 
11, 276-270 feet, x 40.' 
22. — Gythere parallelogramma, G. S. Brady. Left valve. Mallee 
bore No. 9, 315-325 feet. x 52. 
23. — Gythere postdeclivis, Chapm. a , left valve ; b, profile of valve. 
Mallee bore No. 10, 310-320 feet, x 40. 
24. — Gythere rastromarginata, G. S. Brady. Bight valve. Mallee 
bore No. 11, 170-175 feet, x 52. 
Plate LXXIY. 
Fig. 25.— Gythere scabrocuneata, G.S. Brady. Bight valve of a quadrate 
variety. Mallee bore No. 11, 457-458 feet, x 40. 
26. — Gythere scintillulata , G. S. Brady. Left valve. Mallee bore 
No. 5, 189-190 feet, x 52. 
27. —■ Gythere scutigera, G. S. Brady. Left valve. Mallee bore 
No. 5, 189-190 feet, x 40. 
28. — Gythere wyville-thomsoni , G. S. Brady. Left valve. Mallee 
bore No. 10, 310-320 feet, x 40. 
29. —• Krithe eggeri, sp. nov. a , left valve ; b, profile, from below. 
Mallee bore No. 11, 260-265 feet, x 52. 
30. — Lexoconcha australis, G. S. Brady. Left valve. Mallee bore 
No. 10, 225-230 feet, x 52. 
31. — Xestoleberis curta , G. S. Brady sp. Bight valve. Mallee 
bore No. 10, 225-230 feet, x 52. 
32. — Xestoleberis rnargaritea, G. S. Brady. Left valve. Mallee 
bore No. 11, 267-270 feet, x 52. 
33. — Xestoleberis variegata, G. S. Brady. Left valve. Mallee bore 
No. 11, 267-270 feet, x 52. 
34. — Gytherura capillifera, Chapm. a, right valve ; b, profile. 
Mallee bore No. 11, 175-197 feet, x 52. 
35. — Gytherura ouyenensis, Chapm. a, right valve ; b, profile 
seen from above. Mallee bore No. 11, 267-270 feet, x 52. 
36. — Gytheropteron batesfordiense, Chapm. Bight valve. Mallee 
bore No. 11, 440-442 feet, x 40. 
37. — G. batesf rdiense, var. aculeata, Chapm. Left valve. Mallee 
bore No. 11, 453-454 feet, x 40. 
38. — Cytheropteron postumbonatum, Chapm. a, right valve ; 
b , profile seen from below. Mallee bore No. 8, 210-218 
feet, x 52. 
