374 
PETALOPOEA. 
ribs. Zooecia Tvitb the front wall perforated by numerous 
maculae arranged in longitudinal rows. 
Type Species. 
Chry saora pulclieUa, 'Romax, 1840. Campanian: Xorth Germany. 
1. Petalopora pulchella (KOmer), 1840. 
Synonymy. 
Chrysaora pulchella, Eomer, 1840. Verst, nordd. Kr. p. 24, pi. v. fig. 29. 
Ceriopora ,, vou Hageuow, 1846. lu Geinitz, Griindi. Verst, p. 597. 
Petalopora ,, pars, Lonsdale, 1850. lu Dixon, Geol. Suss. p. 285, 
Canalipora ,, you Ilageuow, 1850. In Geinitz, Quadersandst. p. 242. 
oion Cavea ,, d’Orbiguy, 1853-4. Dry. Cret. p. 948, pi. 774, figs. 13-15. 
^ Lithodendron gracUe, Goldfuss, 1827. Petref. Germ. p. 44, pi. xiii. fig. 2. 
Chrysaora gracilis, Giebel, 1848. Planerm. Quedl. : Zeit. Zool. Zoot. vol. i. 
Entalophora royana, d’Orbiguy, 1851. Bry. Cret. pi. 624, figs. 4-8. 
Heteropora ,, Pergens, 1890. Eevisiou, p. 371. 
Zonopora ccespitosa {non Eoin.), d’Orbiguy, 1850. Prod. Pal. vol. ii. p. 267. 
Heteropora [Jlultizonopora) ligeriensis. Vine, 1893. Compl. Eep. : Eep. Brit. 
Diagnosis. 
Zoarium of fairly* stout, cylindiical branches. Apertures 
arranged in iiTegular yerticels with about three or four rows 
in each. 
Maculae from three pairs to five or six pairs in each zooecium. 
Dimensions. 
pi. xviii.,\, figs. If-h, non la-e. 
von Hageuow, 1851. Bry. Maastr. Kr. p. 49, note. 
Schliiter, 1870. Pal. Geogu. S. Scliwedeu : X. Jabrb. 
1870, p. 940. 
p. 10. 
Cavea 
Brauns, 1875. Sen. Salzb. : Zeit. Ges. Xaturw. vol. xlvi. 
p. 402. 
Cavea 
d’Orbigny, 1854. Ihid. p. 945. 
Can 
{non Eora.), d’Orbiguy, 1854. Bry. Cret. p. 942. 
Assoc. 1892, p. 311. 
Diameter of brancli 
Diameter of zooecia 
Diameter of aperture 
1-5 mm, 
•15 ,, 
•08 ,, 
Disteibution. 
England : 
Upper Chalk : Sussex. 
Middle Chalk : Chatham. 
