HETEEOPOEA. 
189 
they are not divided into the large and the small. He stated 
that he knew only the one basal fragment, which was Goldfuss’' 
type ; and von Hagenow’s figure shows on it what I should 
regard as definite mesopores. The specimen appears, therefore, 
to be a true Heteropora, in which the characters are badly shown, 
as the specimen is an old, partly calcified base. A strong argument 
for including the species in Heteropora is given by Heteropora 
tenera, Hag., which is a typical Heteropora (see von Hagenow, 
pi. V. fig. 14i) ; and von Hagenow remarks on his explanation 
of his plate v. that it is “ vielleicht identisch mit Ceriopora 
cryptopora.^^ 
It seems to me simplest to restore Goldfuss’ conception of this 
species, interpreting his fig. Za by von Hagenow’s figure of 
the same specimen (pi. v. fig. 6^;), and including H. tenera, Hag., 
and H. crassa, Hag.', pars (i.e. pi. v. fig. 12, non fig. 13), as 
synonyms. H. tenera is a young branch, H. crassa a thicker 
dichotomous branch, and H. cryptopora, the type (Goldfuss, pi. x. 
fig. 3<?, and Hagenow, pi. v. fig, 6), is the base of a large zoarium. 
The Multicrescis laxata of d’Orbigny ^ resembles this species in 
the hiserial pores around the apertures and shape of the branches, 
but that Bryozoan appears to be a Sparsicavea dichotoma {vide p. 304), 
Goldfuss’ species M. compressa appears to he only a zoarium 
with slightly compressed branches. 
The Museum specimen, D. 6366, agrees precisely in zoarial 
characters with cryptopora^ and, as shown by the magnified figure 
of the surface (Fig. 48, p. 186), it is a true Heteropora. 
LIST OF SPECIMENS. 
D. 6366. Zoaria of var. crassa, Hag. Maastrichter Ealk. Fauquemont. Busk 
CoU. Presentedby Miss Busk. Figs. 47, 48, p. 186; Fig. 49, p. 188. 
60,150. Five specimens labelled Ceriopora cryptopora. Maastrichter Kalk. 
Maastricht. Van Breda Coll. 
D. 3352. A worn stem, showing the heteroporous character but imperfectly. 
Maastrichter Kalk. Maastricht. Van Breda Coll. 
D. 3470. A zoarium 30 mm. long x 20 mm. wide ; in worn areas the structure 
appears that of Ceriopora ; but on the growing edges, where the 
structure is well shown, it is decidedly that of Heteropora ; the 
mesopores occur in single series round the apertures. Maastrichter 
Kalk. Maastricht. Van Breda Coll. 
‘ Bry. Cret. p. 1077, pi. 800, figs. 10, 11 ; the type locality is the Maastrichtian 
at Saint- Colombe, Manche. 
