WG. F.] ACTINIARIA OF THE BAHAMAS. 13 
tubercles, and quite evident. As in A. annulata there is con- 
siderable irregularity in the arrangement of the cinclides. The 
wall of the column in some of the preserved specimens is suffi- 
ciently thin to allow the insertion of the mesenteries to be seen 
through it, and I was able accordingly to study the relation of 
the cinclides to the mesenteries. In one form examined, the 
arrangement was as follows. Starting with an interspace in 
which there were two cinclidal tubercles, five spaces destitute 
of pores followed, the sixth having only one pore; the fourth 
intérspace from this had again only one; the sixth from this, 
again one; the eighth from this, one; the fourth from this, 
one; the fourth from this, two; and so on. The arrangement 
can be better understood from the following scheme :— 
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Ten series of cinclides were thus present in this specimen, 
there being for the most part a single pore in each series, only 
two interspaces possessing two pores. As a rule, a series is 
situated on each fourth interspace, but there are three excep- 
tions to this: in two cases the series is on the sixth interspace 
from the one preceding it, and in the third case it is on the 
eighth, this being probably the result of a series having been 
omitted. In another specimen I could distinguish only nine 
cinclidal series, and of these only one or perhaps two consisted 
of two pores. The relation of the pores to the septa could be 
made out only for a few series, the arrangement for these being, 
WA 
MH 
Here again between the first and second series one has probably 
been omitted. In a third specimen I could count only eight 
series of cinclides, and in this the number of interspaces was 
in one case eight, in four cases four. In none of the specimens 
were there twelve cinclidal series, though the numbers given 
for the last two forms should probably be larger, some of the 
pores having been no doubt hidden by the contraction and 
wrinkling of the column wall. 
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