MXieuicanJAuscum - American Museum of Natural History

16
AMERICAN MUSEUM NOVITATES
NO. 1965
lites in all instances are long and irregular in direction. Budding appears
to be ecologically controlled, probably by situation, as there is
a tendency for buds to cluster on one side and to curve in the same
direction. Septa of all specimens are slightly exsert and arranged in
two groups, the first of which, comprising the first and second cycles,
reaches the columella. The second group does not do so and may be
represented by very low striae on the walls. Costae, which correspond
FIG. 6. Branching coral of the Lophelia-Madrepora type on a boulder
bottom. Smaller actinians or solitary corals in center and left background.
Fish in upper right is unidentified. V4-7 photograph, 984 meters, near Azore
Islands, latitude 370 25' N., longitude 310 10' W.
to the septa in position, are pronounced and sharp on the upper portion
of the corallites, being less so basally. Costae corresponding to the
third-cycle septa appear as moniliform beads. The upper edges of the
septa are slightly rounded, but proximally descend nearly vertically.
Septa of the third cycle bear horizontally directed trabecular teeth on
the proximal edge.