FROM NORTHWESTERN EUROPE 69 
Rollier (1917) suggested that the name sfinulosa had been used by previous 
authors for two quite distinct species ; one of which he considered to be ““ Argovien ”’ 
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Fic. 25. top. Transverse serial sections of A. (Acanthorhynchia) spinulosa (Oppel). Oxfordian. 
Mont Saon, (Haute Marne), France. Specimen donated by the University of Dijon. (x 4). 
BOTTOM. ‘Transverse serial sections of A. (Acanthorhynchia) sp. Kimmeridgian. Oignon 
Limestone, (Ager & Evamy, 1963), Colomieu (Ain), France. (4). 
