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also fan-shaped, nearer the centre of the fossa. The more 
central of these elevations are subequal in height, and might, 
perhaps, in a choked calice be mistaken for pali. It is only 
necessary to examine a specimen free from adhering sediment to 
see that they are integral parts of the septa, and not pali. All 
the septa have granules on their sides, which, especially on the 
surface of the fans, are arranged in a radiating manner; their 
upper edges are rendered very irregular from the presence here 
and there of little knobs and excrescences. 
The primary, secondary, and tertiary septa extend to the cen- 
tre of the calice, but before reaching it, they are twisted, often 
fused together, and all connected by much tortuous calcareous 
matter, having raised papilli on its surface. The columella so 
formed is therefore parietal only, but it occupies a large space in 
the calice. 
The type specimen, which is an exceptionally well-preserved 
one, measures 18 mm. across the primarv septa, and 14°5 mmm. 
where narrowest; diameter of base midway between the 
hexagonal angles, 13 mm. ; thickness through the centre of coral, 
3°) mm. A spine with point broken off is 5 mm. long. 
The dimensions of a larger but worn specimen are :— Diameter 
of calice, 24 and 21 mm. ; and of base, 15 mm. ; length of spine, 
also broken, 8 mm. 
Locality.—Tolerably abundant in the Eocene cliffs at Spring 
Creek, 13 miles south of Geelong, Victoria. 
This elegant coral is quite unlike any other in the Australian 
tertiaries, but is closely allied to one from New Zealand, which 
was doubtfully identitied by Ten.-Woods with Zrochocyathus (1) 
Mantelli, Milne-Edwards. The latter has also basal tubercules, 
while the quinaries which respectively flank the stout primary 
and secondary septa are fused to them at the wall. A drawing 
of its base only was published by Mantell in 1850, and the above 
tentative name was added by Milne-Edwards. Woods’ species is 
probably the same, but in the fragment described and figured by 
him pali were supposed to be present. An example, however, 
from the Waitaki River, in the Museum of the University of 
Adelaide, which has been placed in my hands, shows no pali, but 
only raised structures on the upper central margin of the septa 
just as in S. Tatei, and I therefore conclude that it should also 
be referred to Moseley’s genus Stephanotrochus. 
FAMILY EUPSAMMID AL. 
Before describing the next species, a few preliminary remarks 
upon the characteristics of the genus 7’rematotruchus, in which I 
place it, are necessary. 
