BICAVEA. 
107 
specimens of B. rotaformis, tell me that they have not seen one 
with a vasiform body, and my more limited experience has been 
the same. 
LIST OF SPECIMENS. 
D. 2996. Two zoaria, one showing upper and one the lower surface. Lower 
ChalL (Turonian). Xear Freshwater, Isle of Wight. Caprou Coll. 
Figd. PI. II. Figs. 4, 5. 
D. 2997. Two zoaria rising from the same stem. Lower Chalk. Loc. ? Old 
CoU. Figd. PI. II. Fig. 6. 
D. 4581. Two zoaria (on slide) ; the larger has nine cogs. Lower Chalk 
(Turonian). Xear Freshwater, Isle of Wight. Capron Coll. 
D. 4580. A zoarium with seven cogs (on slide). Lower Chalk (Turonian). 
Near Freshwater, Isle of Wight, Capron CoU. 
D. 2280. Two zoaria (on slide). Lower Chalk (Turoaian). Culver, Isle of 
Wight. Presented by Dr. W. F. Hume, F.G.S., May, 1896. 
D. 2998. Three zoaria on chalk. Lower Chalk. Loc. ? Old Coll. One is 
the largest specimen in the collection; it measures 7mm. across 
the capituluni. The longest stem is 3 mm. in height. 
D. 3047. Three zoaria. Lower Chalk (Turonian). Near Freshwater, Isle of 
AVight. J. S. Gardner Coll. 
UNHEPRESENTED SPECIES. 
1. COStata (d’Orbigny), 1853. 
Syx. Multicrisina costata, d’Orbigny, 1853. Bry, Cret. p. 922. 
,, ,, Ubaghs, 1879. Descr. Geol. Paleont. Limb. p. 224. 
,, ,, Hamm, 1881. Bry. mastr. Ob. -Sen. i., Cycl. p. 46. 
Chau. — Allied to Bicavea cupula (d’Orb.), but provided with ten large prominent 
crests (‘ cotes ’) on the upper surface. Hamm includes it in his list of ‘ dubia.’ 
According to the description it appears to resemble the dilatata fonu of 
B. nrnula, but with less numerous veidical plates. 
Distriu. — Senonian — Maastrichtian : Maastricht and Ciply, Belgium. 
2. cupula (d’Orbigny), 1853. 
Syx. Multicrisina cupula^ pars, d’Orbigny, 1853. Bry. Cret. p. 921, pi. 770, 
figs. 9, 10, non figs. 6-8. 
,, ,, ,, Pergens, 1890. Bev. p. 383. 
Radiopora urnula, pars, Pergens & Meunier, 1887. Bry. gar. Faxe : Ann. 
Soc. mal. Belg. vol. xxi. pp. 224, 226, 
Char. — Zoarium compound ; composed of funnel-shaped or pii-iform segments, 
each with a short stout peduncle, about one-third the diameter of the body ; 
each sub -colony has a ring of about ten low, blunt, lobe-Uke tufts along the 
edge of the upper surface. 
Distrib. — Senonian — Maastrichtian : Meudon, near Paris. 
Apf. — This species is characterized by the lobate shape of the ridges on the 
margin of the body occupied by the apertures ; it most nearly resembles 
Bicavea pergensi, in which the ridges bearing the apertures are more numerous 
and less wide. The zoarium of the larger specimen figured by d’Orbigny may 
