FROM THE RED CHALK. 25 



SUE-FAM14.Y— LOPHOSERIN^. 



Genus nov, — Podoseris, Duncan. 



The corallum has a large concave base, by which it is attached to foreign bodies. 



The epitheca commences at the basal margin, and is stout and reaches the calicular 

 margin. 



The height of the corallum varies. 



The calice is generally smaller than the base, and is convex. 



The septa are numerous and unequal, the largest reaching a rudimentary columella. 



The central fossula is circular and small. 



The costse are seen when the epitheca is worn ; they are distinct, connected by 

 synapticulse, and are straight. 



The genus has been created to admit MlcrabacicB with adherent bases and more or 

 less of a peduncle. 



1. PouosEKis MAMMiLiFORMis, Dimcan. PI. IX, figs. 2 — 15. 



The corallum is short, straight, and broad. The base is concave, and is either larger 

 than the calice or there is a constriction immediately above it, and it is slightly smaller 

 than the calice. 



The cahce is round, convex, depressed in the centre, and is bounded by the epitheca. 



The laminge are stout, unequal, curved superiorly, and often join. 



There are five cycles in six systems, the last cycle being very rudimentary. 



The synapticulae are numerous. 



The costse are straight and subequal, and are smaller than the septa. 



The ornamentation of the septo-costal apparatus varies, and there may be an almost 

 moniliform series of enlargements on the septa, or they may be plain. 



The columella is formed principally by the ends of the longest septa. 



The height of the corallum appears to be determined by the growth of the body 

 between the base and the calice. 



Height of the corallum, \ inch. Breadth at the calicular margin ^rd inch. 



JJ 3J » H^"- >? >• !> 33 ? 33 



33 3, 3) 2 3> 33 33 33 3o''^° 53 



Monstrosities are often found amongst specimens of this species. 



Locality. Hunstanton. In the Collection of the Rev. T. Wiltshire, F.G.S. 



