1928 



TYPE AMMONITES— VII 



DCCLXVIIa 



X 0'26 





" Ammonites dorsetensis," T. Wright, 1856, Holotype 



Q.J.G.S., xii, 309, 321. " largest spec, 16 in., [p. 322] ; B.M., C. 3392" 



" Halfway House, Sherborne, Dorset ; Upper Lias 



" Cephalopoda-Bed " ; [Fossil Bed, Upper I.O., truellei] 



Specimen has Wright's holograph label 



DUROTRIGENSIA DORSETENSIS. T. Wright sp. 

 Parkinsonian, truellei ; Genotype. Cf. DXLVI 



