xxvi INFERIOR OOLITE AMMONITES. 



Sowerby's type [" Upper Lias "] : Shepton Beaucbamp, near Ilininster (" Upper 

 Lias"). 



Date of Existence. — Variabilis liemera. 



8. Haugia grandis, 8. Buchman. Plate XXIII, figs. 14, 15; Plate XXIV; Plate 



XXV, fig. 1 ; Plate XXVIII, figs. 1—3 (?) ; 

 Suppl., PI. II, fig. 11. 



1S89. Haugia variabilis. This Monogr., PI. xxiii, figs. 14, 15. 

 1890. jugosa, Ibid., p. 149; PI. xxiv ; PI. xxv, fig. 1; PI. xxviii, 



figs. l-3(?). 



Description. — Platyleptogyral, subangust-exceDtri-umbilicate, subprorsi-recti- 

 costate, parvi-subirregularinodate, alti-septicarinate. 



History. — A young form, though supposed to be identical with Am. jugosus, 

 Sow., was figured first as Haugia variabilis for reason given in explanation of 

 PL XXIII. This was subsequently altered to Haugia jugosa, by which name an 

 adult was also figured. 



Remark. — The adult is a little more irregularinodate than the smaller 

 example. 



Distinction. — From jugosa : — strictly compared with Sowerby's original, the 

 smaller example of this species is slightly less umbilicate, a point of importance 

 where young specimens are concerned. Further, it has smaller ribs less widely 

 separated, the ribs have a slight forward inclination on the lateral area, and they 

 join the carina with a distinct though slight turn forwards on the periphery. It 

 is also slightly thinner altogether. 



From Ogerieni, more angustumbilicate in youth. From patelliformis, more 

 distinctly costate and less acute peripherally. 



Localities and Strata. — Gloucestershire : Coaley Wood (Cotteswold Sands, 

 Bed 16, sect, vi, p. 45) ; North Nibley (Cotteswold Sands, Bed 30, sect, vii, 

 p. 46) ; Chalford Waterworks, near Stroud (" Upper Lias"). Somerset: Pipley 

 Bottom, North Stoke (in an ironshot limestone — E. Wilson, F.G.S.). 



Date of Existence. — Variabilis hemera. 



9. Haugia illustris [Denchnann). 



1887. Ammonites (Hammatoceras) illustris, Denckm., Pi. vi, fig. 1. 

 Remarks. — Denckmann shows three specimens under the name illustris, of 



