xcvi INFERIOR OOLITE AMMONITES. 



2. Gtraphoceras v-soriptum, 8. Bnchman. Plate X, figs. 5, 6; Plate A, fig. 16; 



Suppl., Plate XV, fig. 18; Fig. 58 

 in text. 



1888. Lioceras concavum, var. v-scriptum, This Monogr., PL x, figs. 5, 6 ; 1889. 



PI. A, fig. 16, p. 75 (pars). 



Description. — Concavumbilicate, subcostate. 



Distinction. — From Gr. robiistum, the umbilicus is smaller, and the ribs are less 

 conspicuous. 



Localities and Strata. — Dorset ; Bradford Abbas, Fossil Bed ; Beaminster, from 

 an ironshot matrix ; Stoke Knap, from the Building Stone. Somerset : Stoford, 

 from an ironshot matrix ; Dundry, from the " Limestone and Marl beds." 



Date of Existence. — Goncavi hemera. 



3. GrEArHOCERAS debile, 8. Buchnan. Suppl., Plate XX, figs. 22 — 24. 



Description. — Concavumbilicate, subcostate, declining to striate. 



Distinction. — From other species, by a very small umbilicus and its general 

 dwarfed form. 



Remarks. — This is evidently a dwarf form, distinguished by its " old age in 

 youth " appearance. 



Locality and Horizon. — Dorset : Bradford Abbas, Fossil Bed. 



Date of Existence. — Discitse hemera, presumably. 



/3. Subspissicostate. 



4. Gtraphoceras limitatum, S. Buchnan. Plate X, fig. 7 (type) ; Plate IX, fig. 7 ; 



Suppl., Plate XV, fig. 22. 



1888. Lioceras concavum, var. v-scriptum, This Monogr., PI. ix, fig. 7 ; PI. x, 



fig. 7. 

 1902. Gtraphoceras limitatum, Emend. Anivu. Num., p. 4. 



Description. — Subgradumbilicate, parvicostate. 



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



Date of Existence. — Discitse hemera, presumably. 



II. SUBCARINATE. 



The character of the periphery is different ; a small carina is raised on the 

 fastigate area. 



