88 JURASSIC RHYNCHONELLIDS 
DIsTRIBUTION. The distribution of the species is very uncertain and the only 
definite records are from the “‘ Terrain a Chailles ’’, of northern France and the Swiss 
Jura around Basel. 
OccuURRENCE. The specimens collected by the author at Pagny were from sandy 
limestones containing cherty bands and nodules. The large associated fauna con- 
sisted of ammonites, lamellibranchs, mainly Pholadomya and Lima types, and 
Thurmannella obtrita. T. obtrita was the most abundant element and tended to 
aes 
3:8 3:6 
Fic. 31. Transverse serial sections of Septaliophoria avduennensis (Oppel). Oxfordian. 
“Terrain a Chailles’’. Pagny-sur-Meurse (Meurthe et Moselle). (3). 
