AMMONITES AND NAUTE.OIDS OF WADI HAJAR 



99 



PLATE 23 



Fig. 1 Argentiniceras mutatum (Steuer), bed 57, Mintaq Member (fauna 13), Mintaq Salt Dome, la, lb, CA693, body-chamber. 

 Fig. 2 Crioceratites (C.) cf. villiersianus (d'Orbigny), lower part of Qishn Formation (fauna 15), eastern Jebel Billum. 2a, 2b, CA1298. 

 Fig. 3 Paracenoceras meridionale Tintant, 'Nautiloid Bed", 23 m below top of Shuqra Formation (fauna 1 ), central Jebel Billum. 3a, 3b, CN68, xO.57, 

 phragmocone. 



