SILURIAN BIVALVED MOLLUSCA OF VICTORIA. 
EXPLANATION OF PLATES. 
I. 
Fig. 
1. Orthonota australis, sp. nov. [Type.] Moonee Ponds Creek. [7869. j 
N at. size. 
2. Grammysia abbreviate, sp. nov. [Type.] S. Yarra. [7871.] X2 
3. Parallelodon spryi, sp. nov. [Type.] Wandong. [7950.] Nat. size. 
4. Lcptodomus maccoyianus, sp. nov. [Type.] Broadhurst’s Creek. 
[976.] x 2. 
5. L. heathcotiensis, sp. nov. [Type.] Heathcote. [987.] x 2. 
6. Palceanatina cf. solenoides, J. Hall. S. Yarra. [7875.] xz. 
7. Edmondia perobliqtta, sp. nov. [Type.] S. Yarra. [7876.] xjA. 
8. E. perobliqua, sp. nov. S. Yarra. [7877.] X2. 
9. E. perobliqua, sp. nov. Domain Rd., S. Yarra. [2239.] xf. 
10. Sphenotus warburtonensis, sp. nov. [Type.] Right valve, internal cast. 
Reefton, Warburton. [2240.] Nat. size. 
11. Cardiola cornucopia, Goldfuss sp. S. Yarra. [7878.] Nat. size. 
12. C. cornucopia, Goldfuss sp. Moonee Ponds Cteek. [978.] Nat. size. 
13. Panenka planicosta, sp. nov . [Type]. Mount Matlock. [7879.] X4 
14. P. cingulata, sp. nov. [Type.] McMahon’s Creek, Upper Yarra. 
[2263.] Nat. size. 
15. Paracardium file sum, sip. nov. [Type.] From a wax impression of an 
external mould. Starvation Creek, Upper Yarra. [7881.] x 2. 
16. P. filosum, sp. nov. Cardinal aspect of same X3. 
II. 
17. Ctenodonta portlocki, sp. nov. Wilson’s Station, Lilvdale. [7884.] 
x 2. 
18. C. portlocki, sp. nov. [Type.] S. Yarra. [7883.] xz. 
19. C. portlocki, sp. nov. S. Yarra. [7885.] X2. 
20. C. portlocki, sp. nov. S. Yarra. [7886.] x 2. 
21. Nuculites maccoyianus, sp. nov. [Type.] S. Yarra. [7887.] X2 
22. N . maccoyianus, sp. nov. Junction of Woori Yallock and Yarra. [7888.] 
x 2. 
23. N. maccoyianus, sp. nov. S. Yarra. [7889.] x 2. 
24. N . coarctatus, Phillips, sp. A short variety. S. Yarra. [7890.] 
x 2. 
25. N. coarctatus, Phill., sp. Typical form, from W. of Mt. Disappoint- 
ment. [7891.] x 2. 
26. N. subquadratus, sp. nov. W. of Mt. Disappointment. [977-] X2 
27. N. subquadratus, sp. nov. [Type.] X2. 27 a, Anterior of valve 
more highly magnified to show surface ornament. N. of Yan Yean. 
[7892.] ' x 4. 
28. N . jutsoni sp. nov. [Type.] Wandong. [7893.] x 2 
29. Nucula melbournensis, sp. nov. Internal mould. S. Yarra. [7896.] 
x 2. 
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