1926 



TYPE AMMONITES— VI 



DCLXXXIV 



Fig. r 



^S3 



Fir. I a 



Fig. 2 



Fig. 2a 

 Nat. Size 



X ' 4 t 



Grammoceras SOLONIACENSE 



Vigo Brickyard, Northampton, Up. Lias, commune zone 



[" Cerithium Beds," B. Thompson] ; S.B. Coll. 4635 



S. 17-5, 41, — , 28-5 ; 27-5, 36, 32-5. 33 ; ventral lappet 9 mm. 



Diff. G. soloniacense, Lissajous, (i, 5, lectot.), proportions and sulcation 



MACONICERAS VIGOENSE, nov. 

 Hildoceratan, vigoense ; Genotype, Holotype. Cf. DCLXXXII 



