15 
and Sponges (case 8). Here may be seen the 
remarkable leaf impressions in travertine limestone 
from Hobart. 
Here is shown a beautiful and unique series of Australian Case 9. 
Tertiary Corals. Diagrams of the structure of the 
calyx accompany the chief types. 
A typical set of Sea-urchins or Echinoids, including Case 10. 
the gigantic Linthia, from the Murray Basin. 
Sea-mats or Polyzoa (Retepora), and Lamp-shells Case 11. 
or Brachiopods (Magellania) ; one cast in clear 
gypsum shows the brachial loop. 
Bivalved Mollusca, such as Trigonia, Chlamys, and Cases 11 to 13. 
Spondylus. Trigonia, once living in the English 
area, is now only found round Australia. 
Scaphopods (Elephant-tooth shells), Chitons or Mail- Case 13. 
shells, and Gasteropods or Snails. 
These contain ancient Mutton-fish shells (Haliotis), Cases 13 to 18* 
Turret-shells (Turritella), Cowries (Cypraea), 
Volutes (Voluta), Cones (Conus), and Nautilus. 
Fig. 16. A Flanged Cowrie — Palliocypraea gaslroplax (McCoy). 
From the Balcombian of Muddy Creek, near Hamilton. 
