254 
EADIOPOEID^. 
well described or figured, but the figures of sellula were excellent. 
Further discussion, however, is unnecessary, for the obvious course 
is to adopt stellata as the oldest available name. 
Figs. 71 and 72. — Lichenopm'a stellata. A compound zoarium in the cariom 
and subcariosa stages; x 5^. D. 3446. Fig. 71, side view; Fig. 72, 
upper surface. 
LIST OF SPECIMENS. 
J). 3510. A zoarium of var. fiisiformis. Maastrichter Kalk. Maastricht. 
Van Breda Coll. Fig. 62, p. 248. 
! 60,156. Box with about sixty zoaria of pedunculate form. Maastrichter Kalk. 
Maastricht. Tan Breda CoU. Two zoaria are selected for figures 
and sections. 
60,156a, b. Figs. 63, 64, p. 250 ; Figs. 65, 66, p. 251. 
D. 3445. A zoarium of four sub-confluent colonies in the subcariosa stage. 
Maastrichter Kalk. Maastricht. Van Breda Coll. Figs. 69, 70, 
p. 253. 
D. 3446. A compound zoarium 10 mm. long, 7 mm. wide, and 5 mm. high. It 
consists of a parent colony and two younger ones growing from the 
upper surface of the parent ; the larger of the two secondary 
zoaria has radial groups of apertures, but they are not developed 
in the smaller zoarium, which is therefore in the cariosa stage. 
This specimen shows that L. costata passes through a cariosa 
