51 
Ludlow Geoup — conld. 
13. Favosites multipora (?), Lonsd. 
14. „ fibrosa, Groldf. 
15. ,, gotlilandica, Fougt. 
IG. Pi’opora tabiilata, Lonsd. 
17. Plasmopora petaliformis, Lonsd. 
18. Heliolites megastoma, McCoy. 
19. „ Murchisoni, M. Edw. and J. II. 
20. Chonetes striatella, Dalm. 
21. Pentamerus Enightii, Sow. 
22. Euoraphalus pleuropborus, Dc Eon. 
23. „ (Ompbalotrocbus) Clarkei, De 
24. Illsenus Wablenbergii (?), Barr. 
25. Encrinurus punctatus, Briinn. 
26. Bronteus Partscbii, Barr. 
27. Ilarpes nngula, Sternb. 
Eon. 
Llandovery Qv^om^—contd. 
12. Pentamerus oblongus, Sow. 
13. Atrypa reticularis, Linn. 
14. ,, hemispbrerica, Sow. 
15. Eetzia Salteri, Dav. 
16. Spirifer crispus, Hising. 
17. Meristella tumida (?), Dalm. 
18. Pterinea pumila, Dc Eon. 
19. ,, ampHata, Phillips. 
20. Euomphalus solario'idcs, De Eon. 
21. Conularia Sowerbyi, Defi. 
22. Ortboceras Ibex, Sow. 
23. Entomis pelagica, Barr. 
24. Staurocepbalus Clarkei, De Eon. 
25. Cbeirurus insignis, Bayr. 
26. Encrinurus Barrandei, De Eon. 
27. Cromus bobemicus, Barr. 
28. „ Murchisoni, De Eon. 
29. Calymene Blumenbacbii, Brong. 
30. Proetus Stokesii (?) Murcb. 
31. Licbas sp. (?). 
32. Bronteus goniopeltis, Dc Eon. 
Au examination of these tables shows the following facts : — 
1st. That the species belong almost half and half to the upper beds and 
the lower respectively of the most recent epoch of the Silurian Period. 
2nd. That the greater part of the species in the first column is made 
up of Actinozoa and Crustacea, while the Mollusca and Crustacea form almost 
exclusively the second. 
ord. That Graptolitcs are entirely wanting, whilst a large number of 
these organisms were recorded in 1861 by Professor McCoy, and more recently 
by Mr. L. Etheridge, junr., in the Silurian of Victoria. It must he 
pointed out that these savants have identified the rocks that have yielded the 
material used in their researches with those which are known in England as 
the Bala, belonging to a lower horizon than those in which were collected 
the specimens submitted to me ; hut wdiich, up to the present, have not been 
shown to occur in New South Wales. 
I 
