clxxxviii INFERIOR OOLITE AMMONITES. 



found in the family Polymorphidae, but is more ornate than in other genera, except 

 Uptonia. It has a certain likeness to that of Hammatoceras, and curiously enough 

 certain species of this genus have some outward resemblance to certain, as yet un- 

 described, species of that genus which occur in the same bed : the species of Fon- 

 tannesia may, however, be distinguished by lacking the pronounced carina, which 

 is also a septicarina, of the species of Hammatoceras. 



No foreign locality, so far as I am aware, has yielded any species of this genus. 

 Hitherto nearly all the specimens have come from a small area within about two 

 miles' radius of Bradford Abbas, Dorset ; only one or two have come from places a 

 little more distant. Much interest therefore belongs to a specimen of this genus 

 found by Mr. J. W. Tutcher so far away as Dundry, Somerset, which is not only 

 more than 30 miles from Bradford Abbas, but is separated therefrom by the 

 Mendip axis. 



The earliest species to be named was called Harpoceras Boweri ; the next was 

 designated Dumortieria grammoceroides, named by Dr. Haug from a British 

 example of which he has very kindly sent me a plaster cast. Before this, species 

 of the genus had long been known by the name Am. Levesquei. 



Typical series. 



1. Fontannesia explanata, 8. Buchman. Plate XL VI, figs. 6, 7. Suppl., Fig. 187, 



p. cxcvi. 



1892. Dumortieria grammoceroides, This Monogr., PI. xlvi, figs. 6, 7. 

 1902. Fontannesia explanata, Emend. Amm. Noiii., p. 6 (xlvii misprint). 



Description. — Subplatysubleptogyral, latumbilicate ; subpaucicostate ; periphery 

 fastigate, subcarinate. 



Localities and Stratum. — Dorset : Bradford Abbas, Fossil Bed ; Louse Hill, near 

 Halfway House. 



Bate of Existence. — Discitse hemera. 



2. Fontannesia geammoceeoides (Haug). Plate XLVI, figs. 1 — 3. Plate XLVII, 



figs. 15 — 17 ; Suppl., Fig. 186, p. cxcvi. 



1892. Dumortieria grammoceroides, This Monogr., PI. xlvi, figs. 1 — 3 ; PI. xlvii, 



figs. 15—17, p. 262. 

 1902. Fontannesia — Emend. Amm. Nom., p. 6. 



Distinction. — From Font, explanata, the broader, flatter periphery, also the 

 somewhat smaller umbilicus and the rather stouter whorls. 



