110 



on the calicular wall : beyoud their union with the quaternary 

 septa the tertiary septa project in paliform fashion. 



The columella, which is small and deep-seated, is made up of 

 a few trabeculse from the septa of the first three cycles. 



Greatest height of corallum 9 niillim. 



Major diameter of calicle 7 » 



Minor » » » 3.5 » 



The nearest relative of this species appears to be E. australice 

 Tenison-Woods (Proc. Liun. Soc. New South Wales II, 1878, 

 p. 333), in which however the septa of the third order unite 

 with those of the second order. 



In E. Weberi the characteristic feature is the paliform expan- 

 sion of the tertiary septa after their union with the quaternaries. 



30. Heteropsammia pisum n. sp. 



The corallum is irregularly pisiform, having the base convex: 

 its outer surface is elegantly granular, the granules being close-set 

 and discrete, and those on the sidewall being compressed and 

 having a tendency to an arrangement in lines. 



The calicular orifice is oval. The septa, which are in six systems 

 and four cycles with an incomplete fifth cycle, are exsert and 

 elegantly echinulate. Those of the first two cycles, which are of 

 about equal size, are thickened and spongy. Those of the first 

 cycle aloue are free (and even they are fused at their summit 

 with the immediately adjoining quaternaries) but they alone retain 

 their independence up to the columella : those of the second cycle 

 are usually prevented from reachiug the columella by the union 

 of the quaternaries in front of them. The quaternary septa are 

 niuch larger than the tertiaries : those of each half-system unite 

 with one auother in front of the tertiaries halfway down the 

 calicular fossa, and then unite with their fellows of the other 

 half-system in front of secondaries close to the columella: all the 

 quaternary septa unite with the summits of the adjoining (exsert) 



