Or NEW SOUTH WALES. 307 



costee springing from the edge of the base and quite distinct, 

 straight, flat, broad or circular and seen from above look like 

 pillars, very finely granular equalling the interstices in thickness 

 and projecting above the edge of the calice forming protuberances 

 which alternate with the costoe, being equal in number with them. 

 The wall is quite distinct from both septa and costse. Diam. 4-6. 

 Alt. 3-4f mil. 



Six specimens of this remarkable species were dredeged up at 

 71 fathoms off Port Stephen's by Mr. Macleay. It departs very 

 much from all our other species in its shape and in the wall, the 

 pali and in the peculiar costse which alternate with the septa. 



Sub Family TurbinolinjE. Pali entirely absent. 



Genus Sphenotrochus, M. Edw. fy H., 1848. 



Corallum simple, free, and without trace of adherence, straight 

 and cuneiform ; calice elliptic ; columella lamellar, extending 

 horizontally along the greater axis of the cup ; septa few and 

 exsert ; costse broad, either smooth, crisped or papillary. 



Sphenotrochus variolaris, Nobis. 



This species has been fully described and figured by me as a 

 fossil in the Proceedings Roy. Soc, N. S. Wales, 1877. It exists 

 on the South East coast, three specimens having been dredged 

 up by Mr. Macleay, off Port Stephens, at 71 fathoms, and Mr. 

 Brazier has obtained others. 



Sphenotrochus australis, Duncan. 



This name was given by me to a specimen sent to England in 

 1864. It is described and figured by Professor Duncan in the 

 Jour. Geological Society for 1870, p. 297. It is rather a common 

 fossil in the Muddy Creek beds. It is not known to be living. 



Corallum compressed, angular and deeply excavated inferiorly, 

 long axis double the length of minor ; costee broad, wavy, well- 

 defined and descending to ends of lateral processes ; calice not 

 shallow, elliptical ; columella long, lamellar ; primary and secon- 

 dary septa joined to columella, not exsert, smooth ; all septa 



