EXPLANATION OF PLATE XIX. 
Fig. 1. Cyclonema australis, Eth. fil. A nearly perfect specimen seen from 
the back. 
„ 2. The same, front view. 
„ 3. Cyclonemo i lilydalensis, Eth. fil. Slightly crushed example seen 
from the back. 
„ 4. Phanerotrema australis , Eth. fil. A small individual, showing the 
band, seen from the back, 
„ 5. A full grown, although badly preserved example, seen from the 
back. 
„ 6 . Bellerophon cressivelli , Eth. fil. A broken specimen seen from the 
front. 
„ 7. The same from the side, with the filled up umbilicus. 
„ 8. The same from the posterior, exhibiting the band and sinus. 
[The figures, from drawings by Mr. G. H. Barrow, of the Australian 
Museum, are of the natural size.] 
