INFERIOK OOLITE AMMONITES. 



5. Hypeelioceeas cuevicostatum, S. Buchman. Suppl., Plate XVI, figs. 4 — 6. 



Description. — Costate (declining) ; subgradmnbilicate ; subdensiseptate ; brevi- 

 subangustilobate . 



Distinction. — From H. discites, the larger umbilicus. 



Remarks. — The figured example is mostly without test, hence the small size of 

 the carina, which has, however, been drawn not quite prominent enough. Still, 

 the carina is not so developed as in similar species. 



Locality and Stratum.— Dorset : Bradford Abbas, Fossil Bed. 



Date of Existence. — Discitas hemera, presumably. 



6. Hypeelioceeas eudldiscites, S. Buchman. Plate XVIII, figs. 1, 2 (Type) ; 



Plate XVII, figs. 3, 4; Suppl., 

 Fig. 94, p. clxv. 



1886. Ammonites discoidetjs, Quenstedt, Amm. Schwab. Jura, PI. lviii, fig. 4 only. 

 1889. Hypeelioceeas discites, This Monogr., PL xviii, figs. 1, 2 ; PL xvii, figs. 



3, 4, p. 94. 

 1902. eudidiscites, Emend. Amm. Norn., p. 4. 



Remarks. — A necessary change of name. Fully described on p. 94. 

 Distinction. — From H. discites, the larger umbilicus (see p. 95) and the less 

 distinct costge. 



7. Hypeelioceeas discitifoeme, 8. Buchman. Plate XVI, figs. 12, 18; Suppl., Plate 



1889. Hypeelioceeas discites, This Monogr., PL xvi, figs. 12, 13 only. 

 1902. discitifoeme, Emend. Amm. Norn., p. 4. 



Description. — Subconcavumbilicate ; spissi-parvicostate, declining to striate. 



Distinction. — From H. rudidiscites, thinner, more compressed around umbilicus, 

 which is also rather more exposed. From H. discites, less prominent costge, more 

 closely set. 



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

 part; Burton Bradstock, from a grey matrix (Collection of Mr. D. Stephens). 



Date of Existence. — Discitde hemera. 



