xxxii INFERIOR OOLITE AMMONITES. 



country, so that the present classification depends mainly on figures. But it may- 

 be remarked that the true Bayani-growp would be the recticostate species, while 

 circumstances render it desirable to choose as the type of Brodieia a flexicostate 

 form. Wherefore it is possible that in the future the true B 'ay ani- group, that is 

 the recticostate species, may require another generic name than Brodieia. 



1. Brodieia juncta, S. BucJeman. Suppl., Plate IV, figs. 7 — 9. 

 Cf. 1874. Ammonites Bay ani, Dumortier, PI. x'w, figs. 7 — 9. 



Description. — Platypachygyral, excentri-angustumbilicate, subrursi-parvi-sub- 

 recticostate, parvicarinate. 



Remarks. — The small carina is set in a slightly flattened area of a rather 

 broad periphery, and so the periphery might be termed obsoletely carinati- 

 sulcate. 



Two, sometimes three costas are connate on the inner area to form larger 

 ribs. . 



Distinction. — The periphery distinguishes it from Bayani, which is distinctly 

 carinatisulcate. Bxcentri-umbilication also begins earlier in this form. 



Locality and Stratum. — Barrington, Somerset ("Upper Lias," with Haugise). 



Date of Existence. — Variabilis hemera. 



2. Brodieia curva, S. BucJeman. Plate XXII, figs. 35, 36. 



18S9. InceetjE sedis, This Monogr., PI. xxii, figs. 35, 36. 



Description. — Platypachygyral, excentri-angustumbilicate, flexicostate, non- 

 tuberculate, connaticostate, parvicarinate. 



Remarks. — The style of ribbing is fairly well shown in the figure. A slightly 

 stouter rib on the inner area breaks into two waved ribs. The ribs have not 

 much peripheral projection, but still there is a decided forward turn. 



Localities and, Stratum. — Gloucestershire : North Nibley (Cotteswold sands, 

 Bed 30, section vii, pnge 46). 



Date of Existence. — Variabilis hemera. 



The next species is only placed as Brodieia ? for convenience. It is not that 

 genus, though it has somewhat similar ornament ; but it lacks the association of 

 stout whorls with angustumbilication. It is nodate, and yet leptogyral. It has 



