lxxviii 



INFERIOR OOLITE AMMONITES. 



1. Depaoceras fallax (8. Buckman). Plate XIV, figs. 10, 11 (Type); Plate XXI, 



figs. 7—9 ; Suppl., Plate XVI, figs. 1—3 ; 

 figs. 34 — 36 in text. 



1888. Lioceeas fallax, This Monogr., PL xiv, figs. 10, 11. 



1889. Ltjdwigia Lttcyi, ibid., PL xxi, figs. 7—9. 

 1902. Depaoceras fallax, Emend. Amm. Nom., p. 3. 



m 



Fig. 35. — Radial lines of Dep. fallax, showing development : a, from specimen in PL xxi, figs. 8, 9; L, c, 



from PL xxi, fig. 7; d, from Suppl., PL xvi, fig. 1. 

 Fig. 30. — Suture-lines of Dep. fallax, from the adult, PL xiv, figs. 10, 11. 



Description. — Platysubleptogyral, excentrigradumbilicate, subcrassicostate. 



Remarks. — The costas are rather coarse, somewhat distant, but not very distinct. 

 PL XIV, fig. 10, shows them rather too plainly. If the series of specimens be 

 rightly identified as the examples of the different stages of growth, then it may be 

 remarked that the radial line becomes with age more and more biarcuate by the 

 increasing length of the peripheral projection. On the other hand, the carina 

 decreases in relative importance, being most pronounced in the middle-aged form, 

 Suppl., PI. XVI, figs. 1—3. 



Localities and Strata. — Dorset : Bradford Abbas, Fossil Bed, from the upper 

 part ; Stoke Knap, Building Stone. 



Date of Existence. — Discitse hemera. 



2. Depaoceras hamatum, S. Buckman. Fig. o7 in text. 



Description. — Platyleptogyral, subgradumbilicate, subparvicostate. 



