1926 TYPE AMMONITES— VI DCLVII 



Fig. I 



X t.21 



Fig. 2 

 Fig- 3 



X 126 



Dactylioceras ATTENUATUM 



" Astrop pits. King's Sutton, Northants ; Up. Lias, subcarinatum z." 



" Mus. Pract. Geol. 37972 " ; ribs arcuate over venter 



S. 14, 34. 31, 39 ; 23, 30, 26, 45 ; max. c. 40 mm. + 



ARCIDACTYLITES ARCUS, nov. 

 Hildoceratan, subcarinatum ; Cf . DCLV 



