EEPTOMULTICAVA. 
141 
C. mammilla, which is here regarded as probably a species of 
Canalipora {vide p. 177). Meanwhile d’Orhigny had included 
in C. mammilla a group of Senonian specimens, and subsequently 
Keeping extended its range to the Aptian. Eoth the last decisions 
are doubtful, and d’Orhigny ’s specimens are in any case distinct 
from R. suhstellata. Pergens & Meunier record it from the 
Danian of Paxoe, and say that their specimens agree with the 
form shown by von Peuss in his pi. xxx. fig. 12. Unless this 
record he correct, the species is mainly Cenomanian, hut ranging 
up into the Turonian. 
This species was founded on one of the specimens figured by 
Goldfuss as C. stellata. This specimen (Petref. Germ. pi. xxx. 
figs. \a, h, non fig. e) was apparently intended by d’Orhigny 
for his species suhstellata, and was definitely selected as the type 
by von Eeuss in 1872. The zoarium in the type-specimen is 
massive and tubercular. 
The suhstellata form has certainly some zoarial resemblances to 
Radiopora, hut the apertures lack the essential character, for 
they are not radially arranged. 
Simonowitsch remarks (Pry. Ess. Griinsd. p. 47) that the 
arrangements of the apertures “ ergibt sich gar keine Eegel; sie 
treten gemischt auf.” And their crowded, irregular arrangement 
is shown in his figures. The two specimens D. 3617 and D. 3622 
in the Museum Collection each show in one place a faint linear 
arrangement of the apertures ; but this is probably only accidental, 
and the species must be left in Reptomulticava. 
LIST OE SPECIMENS. 
D. 3618. A zoarium which is iu part a thin incrustation and partly a massive 
nodule 8 mm. thick. The surface of the incrusting part is marked 
by pustules 2 mm. thick. Essener Griinsand. Essen. Pruckmann 
Coll. Fig. 41, p. 140. 
D. 3617. Two pustular zoaria, which have grown as incrustations; one is 
a hollow nodule, having apparently grown over some soft-hodied 
organism. The apertures in one specimen occur in short series, 
with four apertures in a series. Essener Griinsand. Essen. 
Bruckmann Coll. 
D. 3622. A zoarium which begins as a flat incrustation; hut one stem has free 
branches 4-5 mm. high, and thus approaches the form of Itadiopora 
stellata ; the occurrence of some apertures in linear series is faintly 
indicated. Essener Griinsand. Essen. Bruckmann Coll. 
A thin vertical section (on slide). Essener Griinsand. Essen. 
Bruckmann Coll. Fig. 40, p. 140. 
D. 3669. 
