28 _ Prof. P. M. Duncan on the 
retain a considerable development as far as the columella. 
The septal number appears to be incomplete five cycles. 
Coste variable in thickness, some large, may be alternately 
large and small or subequal, never very prominent, close, 
wavy, and more numerous than the septa, occasionally 
uniting. Epitheca’ covering the coste and interspaces. 
Synapticule distinct, large between the coste, with a broad 
attachment to the lamine, and a conical top; numerous and 
small between the septa. 
Height 16°5 millim., breadth of calice 11°5 millim., breadth 
of stem 11 millim., breadth of the upper expansion 13 millim. 
Loc. Red Chalk, east of England. 
All the Podoseridz appear to obtain their septal develop- 
ment soon, and when very short the coralla have usually a 
high septal number. 
This evident truth rather led to the belief that a very short 
but broad form might be the young of Lodoseris elongata, 
Dune. (Pal. Soc. 1869, Monogr. Brit. Foss. Corals, 2nd ser. 
pt. il. p. 26), or even of Podoseris Jessoni; but it appears 
that the short form must be credited with five complete cycles 
of septa. 
Podoseris brevis, sp. nov. (Pl. V. figs. 7 and 8.) 
Corallum attached by a broad base, very low, subcylin- 
drical, The calice is widely open, shallow, and slightly 
narrower than the base. ‘The septa stout, enlarging here and 
there, long, uniting in groups, so that a few only (seven or 
eight) reach the axial space, moderately close, lowly arched 
above, and with rounded papillz on their free edge, or rudi- 
mentary and placed between pairs of larger septa, and rarely 
long enough to unite with one of the longer septa. Five 
cycles. 
Columella formed by the septal ends. Costz short, usually 
alternately large and small or subequal, covered with epitheca ; 
bifurcation of the coste rare. 
Breadth of the attached base 10°5 millim., breadth of calice 
9°5 millim., height 8-3°5 millim. 
Loe. Red Chalk, east of England. 
Podoseris mamilliformis, Dunc. (Pl. V. fig. 9.) 
Podoseris mammiliformis, Dunc. 1869, Pal. Soc., Monogr. Brit. Foss. 
Corals, 2nd ser. pt. 11. no. 1, p. 25. 
This species was the type of the genus and was described 
from a considerable number of specimens, all of which were 
