SUPPLEMENT.— BRATJNSIXA. xcix 



umbilicate stocks, whereof the majority are recognisable by their characteristic 

 radial lines. Of certain concavnmbilicate forms the graclumbilicate species are not 

 known. Still some of snch concavnmbilicate species have been described. 

 Graphoceras is a case in point ; but others have not been described, because, 

 lacking the distinctness of Graphoceras, they are difficult to classify until their 

 gradumbilicate connections are known. On the other hand, to certain gradumbili- 

 cate species the angustmnbilicate terminals have not been allotted ; some of the 

 undescribed concavnmbilicate species will probably be found to be these required 

 angustumbilicate terminals. This is a matter for future work ; neither time nor 

 space permits full investigation now, while so many families of Inferior Oolite 

 Ammonites remain untouched. 



XXXVI. Genus — Braunsina, 8. BucJcman. 



(Type : Braunsina contorta, sp. u.) 

 1902. Braunsina, Emend. Amm. Nom., p. 3. 



Definition. — Platyleptogyral, sublatumbilicate ; subdensiseptate, sublongi- 

 subangustilobate ; laterally anguliradiate ; peripherally anguliradiate (increasingly 

 acute), fastigate, parvicarinate. 



Distinction. — From Pseudographoceras, the persistence of the 

 costse and the fastigate periphery. The latter character and the 

 less V-script radial line are features of distinction from Platy gra- 

 phoceras. From Graphoceras, the less V-script line, and the fig.62.- 

 relatively larger umbilicus. of '*%"£*" 



1. Braunsina aspeea, 8. BucJcman. Suppl., Plate XVII, figs. 13 — 15. 



Description. — Subplaty-subpachygyral, costate (not adult ?). 

 Note. — In some cases the costse are connate, in pairs, on the inner margin. 

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

 Date of Existence. — Discitx hemera. 



2. Braunsina contorta, 8. BucJcman. Suppl., Plate XVII, figs. 16 — 18. 



Description. — Costate to subcostate. 



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



Date of Existence. — Discitse hemera. 



