lxxvi 



INFERIOR OOLITE AMMOXITES. 



Fig. 32.— Radial 

 lines of Lucya marjna. 



3. Lucya magna, 8. Buchnan. Plate VI; Suppl., Fig. 32 in 



text. 



1887. Lioceras concavum, var. a, This Monogr., PI. vi. 

 1902. Lucya magna, Emend. Amm. Nora., p. 4. 



Description. — Platyleptogyral, concavumbilicate, subobscuri- 

 crassicostate to striate. 



Distinction. — From Luc. marginata, the concavumbilicus. 



Locality and Stratum. — Dorset: Bradford Abbas, Fossil 

 Bed, presumably lower part. 



Date of Existence. — Goncavi liemera, presumably. 



4. Lucya? cavata, S. Buchnan. Plate IX, figs. 1—4; Suppl., Plate XV, fig. 20. 



1888. Lioceras concavum, var. v-scriptum. This Monogr., PI. ix, figs. 1 — 4 



only. 

 1902. Lucya cavata, Emend. Amm. Nora., p. 4. 



Description. — Platyleptogyral, concavumbilicate, striicostate to striate. 



Distinction. — From Luc. magna, the concavumbilicus is larger, exposing more of 

 the inner whorls ; the character of the costation is less coarse. 



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

 judging by matrix. 



Date of Existence.— Discitse hemera, presumably. 



XXVIII. Genus — Paineia, 1 S. Bud-man. 

 (Type: Paineia nitens, sp. n.) 



Definition. — Platyleptogyral, subangustumbilicate ; subdensiseptate, subbrevi- 

 subangustilobate ; laterally flexiradiate ; peripherally latanguliradiate, subfastigate, 

 parvi-nonsepti-carinate. 



Distinction. — From Lucya, the characters of the suture-line and the proportions 

 of the costae. 



Notes. — The suture-lines are closer together, there being about three in Paineia 

 where there are two in Lucya ; and the lobes of Paineia are distinctly shorter. 

 With the same sized umbilicus the costse are developed on a much less liberal plan 

 in Paineia than in Lucya. 



1 In honour of the late Dr. T. Paine, for many years Hon. Secretary of the Cotteswold Field 

 Club. 



