PETALOPOEA. 
375 
Foreign : 
Senonian — Maastrichtian : Meudon ; Royau. 
Campanian : Qiiedlinburg and Gebrden, Hannover. 
Santonian : Saintes, Cliarente-Inferieiu’e. 
Coniacian: Tonrs and Lnynes, Indre-et-Loire ; Yilledien, 
Loir -et- Cher. 
Turonian or Coniacian: Yendome, Lisle, Troot, etc., Loir-et-Cher. 
Tnronian — Angoumian: Yillardin, Loir-et-Cher; Moutier and Merpins, 
Charente. 
Figures. 
PI. XI I. Fig. 7. Part of a branch of a specimen figured by 
Lonsdale [np. cit. pi. xviii. a, fig. 7/); X 10 dia. Upper Chalk: 
Snsse.x. Dixon Coll. B. 4485. 
Affixities. 
The zonal arrangement of this species, though somewhat 
irregular in its development, appears snfiiciently constant to be 
of specific distinction from the commoner species P. costata. 
D’Orbigny included Ceriopora coispitosa, Horn., in this species, 
owing to a misprint by Homer, who in his text twice refers to his 
pi. V. fig. 29 ; blit Ceriopora cmpitosa shown on Homer’s pi. v. 
fig. 28 is quite dilferent. 
The figure given by Goldfuss of his Lithoclendron gracile shows 
no apertures and is indeterminable, and the name therefore cannot 
claim priority. 
LIST OF SPECIMEXS. 
British. 
B. 4485. 
B. 4488. 
D. 4553. 
D. 4554. 
D. 700. 
B. 4486. 
B. 4487. 
A hrancli with quadriserial zones. Upper Chalk. Sussex. Dixon 
Coll. Figured hy Lonsdale in Dixon, Geol. Sussex, pi. xviii. a, 
fig. 7/; refigured on PI. XII. Fig. 7. 
Another hrancli. Chalk. Sussex. Dixon Coll. Figd. Lonsdale, 
op. cit. pi. xviii. a, fig. Vi (upper figure). 
A hrancli (on slide) . Upper Chalk. Sussex. Dixou Coll. 
Two long hrauclies. Chalk. Near Maidstone. Bowerhauk Coll. 
A branch near the base. Middle Chalk. Chatham. Yine Coll. 
Recorded by Yine as Heteropjora CShdtizompora') Ugericnsis, Orb. 
A branch in the .stage of pohjpora. Chalk. Sussex. Dixon Coll. 
Figd. Lonsdale, op. cit. pi. xviii. a, fig. 'Icj. 
Basal part of a branch almost completely buried in epitheca. Chalk. 
Sussex. Dixou CoU. Figd. Lonsdale, pi. xviii. a, fig. Vi, (lower 
