TERTIARY CORALS. 59 



pali are small and lobular, and appear to be placed before all the septa except those of the 

 fourth cycle. 



The cost« are distinct from the base upwards, are subequal, slightly prominent, and 

 granular. The intercostal grooves are very distinct. Near the calicular margin the costae 

 are often found projecting outwards and becoming exsert. 



Height of the corallum , — ~ inch. Diameter of the calice ^ths inch. 



Locality, Bramshaw, New Forest. In the collection of Frederick Edwards, Esq., 

 F.G.S. 



2. Paracyathus Haimei, Duncan. Plate IX, figs. 12 — 14. 



The corallum is short and broad, and its base is nearly as broad as the calice. 



The wall is thin. 



The calice is irregularly elliptical, and its long axis is on a lower plane than the 

 short axis. The margin is sharp and iiTegular, the fossa is not deep, and the columella 

 does not occupy very much space. 



The septa are slender, crowded, unequal, granular, and slightly exsert. There are 

 six systems, and the arrangement of the cycles is very irregular. There are two systems 

 in which the septa of five cycles are complete, two in which they are incomplete, and two 

 presenting septa of four cycles only. The primary septa are readily distinguished, 

 and all the septa are long and often flexuous. The tertiary septa join the secondary 

 in some systems. 



The pali are present before all the septa, except those of the last cycle. 



The columella'is spongy. 



The costse are thin, sharp, laminate, and project; they are often slightly flexuous, 

 and their free margin is moniliform. The intercostal spaces are wide and deep. 



There are traces both of exotheca and of endotheca. 



Height of corallum j%ihs inch. Great diameter of calice ^ths inch. 



Locality, Barton. In the collection of Frederick Edwards, Esq., F.G.S. 



These Faracyatlii ai'e closely allied to the species already described from the London 

 Clay, by MM. Milne-Edwards and J. Haime. 



P. Haimei differs, however from its nearest ally, P. crassus, in its septal arrangement, 

 in the sharpness and ornamentation of the costse, and in the size of the intercostal 

 spaces. 



P. cylindricus has some resemblance to some varieties of P. caryophyllus, but the 

 septal arrangement, the small columella, and the very small pali, distinguish it. 



