xxiv INFERIOR OOLITE AMMONITES. 



Correction. — It is doubtful if the rursicostate character is a feature of this 

 species, for d'Orbigny's small specimen (figs. 3, 4), wherein it is shown, may 

 not really be a young variabilis. 



Remarks. — In regard to d'Orbigny's figure of variabilis, it may be noted — that 

 the costge are not equally distant, but that they are somewhat bunched in a 

 triform arrangement with wider interspaces ; that there is a definite costate 

 space between the nodi and the inner edge of the next whorl ; that the umbilicus 

 is large and fairly concentric ; and that the compression is considerable. 



The specimen which I possess does not show any irregularity in the width 

 between the groups of costas. It agrees in other respects, but identification with 

 variabilis may not be correct; nor does the specimen formerly in Dr. Wright's 

 possession show this irregularity of costation. 



Localities and Strata. — Gloucestershire : North Nibley (Cotteswold Sands, 

 Bed 30, section vii, p. 46) ; Dorset : " sands between Lias and Inferior Oolite, 

 near Bridport," Wright, p. 458. It is possible the writer may have been mis- 

 taken on these points. 



Date of Existence. — Variabilis hemera. 



5. Haugia Ogeeieni (Dumortier). 



1874. Ammonites Ogeeieni, Dumortier, PI. xix, fig. 5. 



Desertion. — Subplatyleptogyral, sublatumbilicate, versicostate, nodate, 

 septicarinate. 



History of Specific Name. — Dumortier figures two specimens as Ogerieni. The 

 one marked fig. 5 is more umbilicate than the example placed as figs. 3, 4. 

 Since the latter appears to be the same as Sowerby's jugosus, the former may now 

 be taken for the type of Ogerieni. 



Remarks. — A specimen about 205 mm. in diameter from Shepton Beauchamp 

 is distinct from any other similarly large specimens of Haitgia, and it appears to 

 be the adult of Dumortier's Ogerieni as now defined ; but the centre is too 

 ill-preserved to allow of exact comparison. 



Localities. — Gloucestershire : North Nibley (Cotteswold sands) ; Somerset : 

 Shepton Beauchamp (" Upper Lias "). 



Date of Existence . — Variabilis hemera. 



