SUPPLEMENT— BRODIEIA. xxxi 



Distinction. — The flexicostate character is a good noticeable feature. 

 Locality and Stratum. — Gloucestershire : North Nibley (Cotteswold Sands, 

 Bed 18, section vii, p. 46). 



Bate of Existence. — Variabilis heraera. 



2. Phymatoceras pauper, 8. Buclcman. Suppl., Plate III, figs. 7—9. 



Description. — Platyleptogyral, angustumbilicate, subflexi-parvi-densicostate, 

 parvituberculate, septicarinate. 



Bistinction. — The species is distinguished from Am. Werthi, Denckmann, by 

 smaller umbilicus and more distant, straighter ribbing. 



Localities and Stratum. — Gloucestershire : Coaley Wood (in Bed 13 of the 

 section given at p. 45 : it is therefore rather more than ten feet above Haugia 

 grandis : it occurs with large Limse, probably L. toarcensis, Dum.) ; North Nibley 

 (Bed 20, p. 46). 



Bate of Existence. — Variabilis hemera. 



VI. Genus — Brodieia, 1 S. Buclcman. 



(Type: Brodieia cueva, sp. n.) 



The Bayani-group. 



Befinition. — Platypachygyral, excentri-angustumbilicate, flexiradiate, parvi- 

 carinate. 



Remarks. — In their mode of growth the species of this genus differ from all 

 other members of the Lillia-Haugia series. There is a combination of a small 

 umbilicus, stout whorls, a broad periphery, and a small carina, in which even if 

 there were any septation such a character would be recognised only with great 

 difficulty. In other members of the Lillia-Haugia series, when a small umbilicus 

 is attained, the whorls are thin, and the carina is strongly elevated with a very 

 noticeable septation. The nearest approach in shape is found in Phymatoceras 

 Bumortieri, but the elevated septicarina at once forms a distinction in that case. 



For the present the species of the Bayani-groxnp may be known as Brodieia ; 

 but probably further separation will be required, as there are recti- and flexi- 

 radiate forms. There is a noticeable scarcity of any of these species in this 



1 In memory of the Rev. P. B. Brodie, F.G.S., my father's friend and fellow-worker. 



