NOTES AND MEMORANDA. 
841 
subjecting them to any more of a shock than was necessary. In 
accordance with a suggestion of Professor Verrill, we were careful not 
to have the specimens out of water for an instant either in collecting 
them or in the subsequent manipulation. Specimens were collected 
at various hours of the day, and examined at about all hours of the 
day and night. Only once were we favoured with a sight of the 
zooids in expansion. Though that observation was far from being as 
satisfactory as could be desired, the writer has thought it might be 
worth while to give an account of it ; for, on a subject so important 
and presenting such difficulties to every observer, every scrap of 
observation is probably w’orth saving. 
The zooids which we saw in expansion showed generally a pretty 
regular whorl of tentacles at the summit. There seemed to be 
indications of a tendency to a grouping of the tentacles in one or 
more whorls below the one at the summit. But these lower whorls 
were not at all regularly developed, and in some cases the tentacles 
were scattered singly without any recognizable arrangement in 
successive whorls. Where an approximation to a whorled arrange- 
ment could be recognized, the number of tentacles in a whorl was 
generally four, but appeared to be sometimes three. As regards the 
arrangement of the tentacles, our observation is therefore substantially 
in agreement with those of Agassiz and Moseley. We feel very con- 
fident that the tentacles are not in uniform and regular whorls of four, 
as figured by Nelson and Duncan. 
The accompanying figures, 1 to 20, represent the outlines of several 
zooids in the various positions in which they chanced to present them- 
selves. The drawings were made hastily while the specimens were 
under examination. It is needless to remark that they make no pre- 
6 . 7 . 8 . 9 . 10 . 
tention to any artistic character. Whatever value they may have 
arises from the fact of a conscientious endeavour to draw exactly the 
outlines which were seen, not a line being added hypothetically or 
inferentially. 
