clxxviii INFERIOR OOLITE AMMONITES. 



Distinction. — From Dum. mutans, costse in umbilicus less coarse, and not declin- 

 ing so rapidly, a more distinct carina on a more definite periphery. 



Localities and Stratum. — Gloucestershire : Penn Wood, Buckholt Wood, 

 Cephalopod Bed, Middle {Dumortieria Beds). Largest specimen 113 mm. in 

 diameter, with last half -whorl smooth. 



14. Dumortieria ykovilensis, S. Buchman. Plate XXXVII, figs. 1(3, 17. Suppl., 



Fig. 172, p. exevi. 



1891. Dumortieria striatulocostata, This Monogr., PL xxxvii, tigs. 10, 17. 

 1902. Yeovilensis, Emend. Ainm. Nom., p. 6. 



Description. — Sublatumbilicate ; costate changing to sublevigate ; periphery 

 fastigate, subcarinate. 



Distinction. — More strongly costate and with a more acute periphery than either 

 D. mutans or D. declinans. 



Locality and Stratum. — Dorset-Somerset border, Yeovil Junction, Sands 

 (Mr. D. Stephens). One specimen measures 11-1 mm. in diameter. 



15. Dumortieria metita, S. Buchman. Plate XLII, figs. 11, 12. Suppl., Fig. 173, 



p. exevi. 



1874. Ammonites radiosus, Bwmortier (non Seebach), Pal. Bassin Rhone, vol. iv, 



PI. xiv, fig. 2 only. 

 1891. Dumortieria radians, This Monogr., PI. xlii, figs. 11, 12. 

 1902. metita, Emend. Anini. Nom., p. 5. 



Description. — Subplaty-subleptogyral ; latumbilicate ; subpauciparvicostate peri- 

 phery convex to fastigate, parvicarinate. 



Localities and Strata.— Gloucestershire : Cam Down, Penn Wood, Cephalopod 

 Bed, middle part (Dumortieria Beds). Foreign: France, " Le Bernard (Vendee) 

 Lias superieur " (Mr. L. Chartron). 



Date of Existence. — Dumortieria hemera. 



10. Dumortieria reqularis, S. Buchman. Plate XLI, figs. -1— G. Suppl., Fie 



174, p. exevi. 



1890. Dumortieria radians, This Monogr., PI. xli, figs. 4—6. 



Description.— Subplatysubleptogyral ; latumbilicate ; spissiparvicostate ; peri 

 phery subtabulate, parvicarinate. 



