26 Prof. P. M. Duncan on the 



The former specific diagnosis therefore requires to be slightly 

 enlarged. 



Podoseris ehngata, Dune., 1869 (amended 1889). 

 (PI. V. figs. 14, 15, 16.) 



Corallum simple, tall, originally and usually permanently 

 attached to foreign bodies by a circular base, the width of 

 which may be larger or smaller than that of the calice. 

 Stem cylindrical and with constrictions and expansions or 

 bluntly conical. 



Calice broad or narrow, concave or convex, with a small 

 central fossula or a projection. Septa numerous, the fifth 

 cycle more or less incomplete ; the higher orders either very 

 small and rudimentary, or absent here and there ; the rest long, 

 broad, arched, close, and uniting more or less, many reaching 

 and forming part or the whole of the small columella. Swol- 

 len in regular series at the sides, swellings more or less 

 oblique, ending in synapticuW, or arched processes or in 

 delicate dissepiments ; sides of septa in ridges and may be 

 granular. 



A small columella, formed by the septal ends, but some 

 interseptal tissue appears to be present. Costse well marked, 

 usually alternately large and small, with bands of synapticulae 

 in transverse series and with many false synapticulai more or 

 less triangular in outline, with or without endotheca, between 

 them. Epitheca in bands. 



Height from 15 to 20 millim., breadth from 9 to 12 millim. 



lied Chalk, Norfolk. 



Podoseris affimsj sp. nov. (PL V. figs. 1 and 2.) 



Corallum tall, formerly attached, base small; stem more or 

 less cylindrical, unequally swollen and constricted ; calice 

 narrower than the thickest part, broader than the base. 

 Calice convex, with a small central fossula surrounded by the 

 inner ends of the longest septa. Septa numerous, long, 

 moderately stout, the larger passing far inwards, rather far 

 apart, some rudimentary, the fifth cycle very^ incomplete, 

 upper edges convex and with a single row of blunt granules. 



Columella deeply seated at the base of the fossula, mostly 

 formed by the ends of septa. Costse close, moderately unequal, 

 apparently more numerous than the septa. Synapticuhe 

 large in the calice and numerous between the costai. Proba- 

 bly an epitheca. 



Height 15 millim., breadth 6 or 7 millim. 



