1926 



TYPE AMMONITES— VI 



DCLXV 



Fig 3 X 1-4 



Fig. 2 N.S. 



Fig. I X 112 



" Lytoceras cornucopia ; B. Thompson, 1891, cit. spec. 



" Brit. Assoc. Rep., Geol. p. 6 ; near Arbury Hill, Northants 



" Up. Lias, Fish Bed, latescens zone ; B. Thompson Coll." 



S. 29, 42, 38, 31 ; 60, 41, 40, 33. SI. subcompact 



Granulate ribs approximate, equal, dividing 



CRENILYTOCERAS CRENATUM, nov. 

 Harpoceratan, crenatum ; Genotype, Holotype. Cf. CCCXCI 



