104 
OSCULIPORIDiK. 
BICAVE A, d’Orbigny, 1853. 
[Bry. Cret. 1853, p. 955.] 
Synonymy. 
Fascieulipora, pars, d’Orbigny, 1850. 
Radiopora, pars, Pergens k Meunier, 1887. 
Lichenopora, pars, Pergens, 1890 ; Ilennig, 1894. 
Multicrisxna, pars, d’Orbigny, 1853; Pergens, 1890. 
Diagnosis. 
Osculiporidse with the zoarium in the form of a capitulum ; it 
has a cylindrical or conical peduncle, surmounted by a solid, 
discoid head, from the margins of which diverge many radial 
fasciculi or ridges, or cog-like teeth. 
Stem surface perforate or imperforate. 
Distkibijtion. 
Cretaceous: Danian to Turonian. 
Type Species. 
FascicuUpora urnula, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 268. 
Senonian : France. 
Affinities. 
The name Bicavea suggests that this genus is an ally of Discocavea, 
Reptocavea, and the rest of that series. But the normal zooecia are 
fasciculate, and the bundles are separated by an intermediate mass 
of zooecia which are subordinate to the zooecia in the fasciculi. 
Bicavea is an Osculiporoid with a capitate zoarium, armed with 
spike-like zooecial bundles. Its nearest ally is Biscocytis, which 
is mainly Cenomanian and is probably the ancestor of Bicavea. 
Bicavea rotaformis,^ Gregory, 1907. 
Stnontmt. 
Bicavea rotaformis, Gregory, 1907. Rotif. BrV. Isle of Wight; Geol. Mag. 
dec. V. vol. iv. p. 442. 
,, ,, Eowe, 1908. Zones of Chalk. — V. Isle of Wight: Proc. 
Geol. Assoc, vol. xx. pp. 220, 235, 263, 284, 300. 
Befrancia diadema, aff., Bristow, 1889. Geol. Isle of Wight, 2nd ed., p. 272. 
Diagnosis. 
Zoarium simple or compound, with a narrow cylindrical stem, 
attached in a circular concavity in the lower part of the body. 
^ Shaped like a cog-wheel. 
