12 
THEONOIDuE. 
JDefraneia complanata, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 266. 
Radiotuhigera ,, d’Orbigny, 1853. Bry. Cret. p. 756. 
Biscocavea ,, Marsson, 1887. Bry. Riig. ; Pal. Abb. vol. iv. p. 41. 
Unitubigera laxata, d’Orbigny, 1853. Bry. Cret. p. 759. 
Actinopora papi/racea, d’Orbigny, 1851. Bry. Cret. pi. 643, figs. 12-14. 
Lichenopora ,, Pergens, 1888. Tuf. Ciply : Bull. Soc. beige Geol. vol. i. 
p. 205. 
M Canu, 1900. Bry. Tours: C.E. Assoc. t'raiK,'. Av. Sci. 
1899, p. 410. 
Unitubigera ,, d’Orbigny, 1853. Bry. Cret. p. 761. 
>> ^ iue, 1891. Bep. Cret. Polvz. : Hep. Brit. Assoc. 1890, 
p. 396. 
Apsendesia ,, Vine, 1891. Ibid. p. 386. 
Vine, 1893. Compl. Rep.; Rep. Brit. Assoc. 1892, 
pp. 313, 333. 
»> M Hennig, 1894. Bry. Sver. Krit. ii., Cycl. : Lunds Univ. 
Arsskrift, vol. xxx. Acta Physiogr. Xo. viii. p. 32. 
Lichenopora organisans, d’Orbigny, 1851. Ibid. pi. 646, figs. 9-13. 
>> Pergens (fc Meunier, 1887. Bry. gar. Faxe: Ann. Soc.malac. 
Belg. vol. xxi., Mem. p. 230. 
M M Canu, 1900. Geol. Romorantin : Bull. Soc. geol. France, 
ser. 3, vol. xxviii. p. 103. 
Radiotubigera ,, d’Orbigny, 1853. Bry. Cret. p. 757. 
Befrancia ,, Bucaille, 1890. Bry. Cret. Seine-Inf. : Bull. Soc. Sci. nat. 
Rouen, vol. xxv. p. 509. 
Apsendesia ,, Vine, 1893. Compl. Rep. : Rep. Brit. Assoc. 1892, p. 313. 
Lichenopora ,, Vine, 1893. Ibid. p. 333. 
Befrancia disciformis {non Miinst.), von Reuss, 1846. Verst, biihm. Kr. p. 64, 
pi. xiv. fig. 34. 
non Cellepora ,, von Munster, 1829. In Goldfuss, Petref. Germ. vol. i. 
p. 105, pi. xxxvii. fig. 4. 
Befrancia subdisciformis, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 266. 
Unitubigera ,, d’Orbigny, 1853. Bry. Cret. p. 760. 
Befrancia ,, von Reuss, 1874. Bry. ob. Pliin. : Pabeoutogr. vol. xx. 
pt. ii.,p. 132, pi. xxv. fig. 7. 
Diagnosis. 
Zoarium circular or subcircular ; very depressed ; with the 
peripheral selvage either broad, or narrow in var. laxata 
(d’Orb.). 
Days of uniserial zooecia ; narrow, crowded, and often curved ; 
they may, however, be straight and regular, or slightly 
irregular. The rays are long, with a narrow selvage in the 
typical long-spoked variety, but they are short with a broad 
selvage in var. papyracea. There may be a central area of 
crowded, irregular apertures. 
