230 
ZONATULID^. 
Figures. 
PI. yi. Pig. la. A zoarium from the side; X 5 dia. Fig. 1^, 
part of the same; X 18 dia. Senonian — Craie marneuse : 
Yillavard, Loir-et-Cher. D. 4924. 
Affinities. 
This species is a very close ally of P. verrucosa, which has 
thicker and less regular branches. 
D. 4924. A zoarium (on slide). Senonian — Craie marneuse. Yillavard, Loir- 
et-Cher. Purchased of F. H. Butler. 
UNREPRESENTED OR DOUBTFULLY REPRESENTED 
SPECIES. 
? mammillifera (Morren), 1829. 
Syn. Ceriopora mammillifera, Morren, 1829. Corall. Foss. Belg. : Ann. Acc. 
Groning, 1828, p. 42. 
“ Milleporite,” Faujas-St. Fond, 1799. Hist. Nat. Mont. St. Pierre, 
p. 206, pi. xl. figs, 'la, h. 
Char. — Massive, nodular, hoUow, tapering to an apex. Pores minute (minu- 
tisshnus, fde Morren). Zooecia in tufts in scattered groups. 
Distrib. — Senonian — Maastrichtian : Maastricht. 
Aff. — T he occurrence of the minute pores recorded by Morren suggests that this 
species is a Flethopora. If multilaraellar in structure, it may he the same as 
Folyphyma bnlbosa of Hamm. 
SPARSICYTIS, Filliozat, 1908. 
[Bry. Cret. Yendome : Bull. Soc. geol. France, ser. 4, vol. vii. p. 398.] 
Diagnosis. 
Zonatulidae with the zoarium arborescent and consisting of 
sub -cylindrical branches. The apertures of the zooecia open 
on prominences, which are elongated horizontally across the 
stems. The raised groups are separated by areas covered 
with mesopores. 
Type Species. 
Plethopora cervicornis, d’Orhigny. Senonian : France. 
Affinities. 
This genus is a close ally of Plethopora, from which it differs 
by the groups of apertures being elongated transversely instead of 
being oval. This difference is lessened by the occasional elongation 
of some of the groups in Plethopora, as in von Hagenow’s type 
of P. verrucosa (von Eagenow, Bry. maastr. Kr. pi. v. fig. lOi). 
