82 | BULLETIN OF THE 
will \, noticed that the flat faces which make up the sides of the animal below 
the syimming-bells are not formed, as in A. elegans, by the upper surfaces of the 
covering scales, but by planes of the same at right angles to the upper and 
lower surfaces of the bract. These faces are produced by the great thickness of 
the scale. Its breadth is simply the thickness of the distal edge of the scale. 
The upper surface of the lowest covering-scale is flat, and fits closely to the 
lower surface of that bract which is immediately above it in the series, and so 
on throughout the whole length of the polyp-stem to the lowest nectocalyx. 
The thickened border of the bract does not present, when seen from the side, a 
single continuous plane surface, but is made up of three or four slightly con- 
cave furrows, separated by ridges, which extend at right angles to the upper 
face of the scale, in the direction of the length of the stem. Both the swim- 
ming-bells and the covering-scales are infested with Distome. The appendages 
to the polyp-stem all arise from one side of the axis and hang downward in such 
a way that when the axis is extended longitudinally the free extremities of the 
polypites slightly protrude beyond the covering-scales. The polypites are 
more highly colored than those of Agalma. No tasters were observed. The 
tentacles resemble in character and origin those of A. elegans F. Each ten- 
tacular knob has a coiled sacculus, a well-developed involucrum within which 
it can be drawn, and two lateral terminal filaments, one on each side of a 
median vesicle. The distal extremities of the lateral filaments are slightly 
enlarged, and colored with reddish pigment. 
Norse. —It may be found, when older larve of A. papillosum F. are studied, 
that it is the same as A. Okenii Esch. 
Rhizophysa Eysenhardtii (?) Gee. 
A single specimen of R. Eysenhardtii (?) was taken in Castle Harbor. The 
species is well marked, and can easily be distinguished from R. filiformis* by 
the absence of tentacular knobs on the tentacular filaments. When first taken 
from the water, the tentacles cling with the greatest pertinacity to whatever 
foreign body they touch. R. filiformis is also said to grasp any adjacent object 
in the same way ; but those which I have studied do not fasten the tentacles 
with the same persistency as R. Eysenhardtiv. 
* The anatomy of the above species of Bermuda Rhizophysa resembles closely 
that of R. planestoma Per. et Les., although in the figures of this species no side 
branches to the tentacles are represented. It also agrees closely in form with a 
species of Rhizophysa described by Huxley, from the Indian Ocean. In the Ber- 
muda species no sexual clusters were found at the base of the feeding polyps, as 
mentioned by Huxley in his species. 
Several specimens of R. jiliformis were found at Bermuda; one of these meas- 
ured over three feet in length. In this specimen the sexual bells were very large, 
and resemble very closely the sexual bodies of Physalia. 
