SUPPLEMENT.— COTTESWOLDIA. cxxxiii 



LV. Genus— Cotteswoldia, 1 8. Buchman. 



(Type: Cotteswoldia paucicostata, sp. n.) 

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

 Definition. — Subplatyleptogyral, sublatumbilicate ; subpauciseptate, brevi- 

 latilobate ; laterally subrectiracliate ; peripherally anguli radiate, fastigate, parci- 

 earinate. (Radial line, fig. 10-5, p. clxv.) 



Distinction. — From Grammoceras, a more distant style of costation, broader and 

 more compressed whorls; and in the main less peripherally projected radii. 

 Deficiency of carination in the costate species. 



Remarks. — Besides the typical series (I) it seems advisable to place here for 

 the present two other series. Their distinctions may be noted in the following 

 manner : 



I. Costse simple. 

 II. Costa? connate. 

 III. Costse connate, but umbilicus persists larger. 



I. Costse simple. 



1. Cotteswoldia paucicostata, S Buchman. SuppL, Plate XXIII, figs. 1 — 3. 



Description. — Distanti-subcrassicostate to obsoleticostate. 



Localites and Stratum. — Gloucestershire, Buckholt Wood (Frocester) ; Bowcott 

 "Wood (Dursley) ; Upper part of Cephalopod Bed (Moorei Beds). 

 Date of Existence. — Moorei hemera. 



2. Cotteswoldia costulata (Zieten). Plate XXXIII, figs. 3, 4; SuppL, Plate 



XXIII, figs. 4, 4 a. 



cf. 1885. Ammonites costula, Quenstedt, Amm. Schwab Jura, PI. liv, figs. 7, 51. 

 1890. Grammoceras costulatum, Tbis Monogr., PI. xxxiii, figs. 3, 4; p. 179. 

 1902. Cotteswoldia costulata, Emend. Amm. Norn., p. 3. 



Distinction. — From C. paucicostata, the ribs are not so coarse and the umbilicus 

 is not so concentric — it is more oligogyral. 



Localities and Stratum. — Gloucestershire : Coaley Peak, Frocester Hill, Hares- 

 field Hill, Cephalopod Bed, upper part. 



Date of Existence. — Aalensis hemera. 



3. Cotteswoldia paeticostata, S. Buchman. SuppL, Plate XXIII, figs. 5 — 7. 



Description. — Subspissicostate, passing to obsoleticostate and levigate. 

 Distinction. — From G. costulata, a larger number of more closely set costse. 

 Locality unit Stratum. — Gloucestershire: Buckholt Wood (Frocester), Cephalopod 

 Bed, upper part (Moorei Beds). 



Date of Existence. — Moorei hemera. 



1 Cotteswold Hills. 



