FROM NORTHWESTERN EUROPE 17 
} sketch of septalium as 
Seer So seen in silicified speci- 
mens of Septal/phoria 
arduennensis (Oppel). 
socket 
transverse sections 
through posterior part 
of brachial valve of 
S.paucicosta sp.nov. 
median 
septum 
hinge plate 
position of septalium (as 
seen in longitudinal section) 
in a rhynchonellid with 
an inflated brachial 
valve. (after Rousselle). median —__ 
septalial 
plate 
with globose specimens septum 
the form of the septalium 
in transverse section is 
as figured above. 
Fic. 7. Sketches to show the form of the septalium in the genus Septaliphoria Leidhold. 
