[3] MEDUSH FROM THE GULF STREAM. 515 
specimens have the body complete, but from the fragments of both 
several common details can be made out. No.1 is destitute of a float; 
No. 2 has the float well developed. 
PTEROPHYSA GRANDIS, Fewkes. 
[No. 1.] 
The stem of this specimen is approximately 20 feet in length in 
alcohol. It is ribbon-shaped, about 3™™ broad. Not twisted. Color 
in alcohol, white. No float present, but this structure is ruptured from 
its connection. 
The terminal polypite is 40™™ in length, elongated, finger-shaped, 
with dark color near its distalend. Onthe proximal third of its length 
it bears two well-marked lateral bands or ptera, which are placed op- 
posite each other on the polypite. The terminal polypite arises from 
a point on the axis where the stem is somewhat thickened. The surface 
of the thickened stem is nodose, probably from contraction. A short 
fragment of atentacle springs from its base of attachment to the stem. 
The stem narrows above the nodose enlargement, becomes again thick- 
ened as it recedes from the polypite, and then diminishes in size to the 
flat, ribbon-like shape of the stem. 
The penultimate polypite is elongated, finger-like, 50™™ in length, 
enlarged into a knob at the distal or oralend. In the proximal region, 
on each side, there are two marked ptera. The penultimate polypite 
is similar to the terminal, and arises from the stem by a long thread 
similar to but smaller than the peduncle. The filamentary union of the 
polypite to the stem arises from a tangled cluster of thread-like bodies 
on the stem. These bodies possibly correspond to the immature lateral 
branches of the tentacle. 
Between the region of the stem from which the tangled lateral bodies 
arise and the other (opposite) end of the stem there are several poly- 
pites, ali of which have similar filamentous attachments to the flat (in 
alcohol) axis, as the ultimate and penultimate. Many small clusters of 
sexual bodies, confined as a general thing to the flat axis, are noticed. 
These bodies have, like the sexual glands of Rhizophysa, the form of 
botryoidal clusters. 
[No. 2. ] 
In this specimen a float and the proximal end of the axis are well 
preserved. The whole axis is 1.9™ long. 
The float is large, 15"™ in length, and appears to be carried upright, 
as in R. eysenhardtti, Geg. It has an apical opening. This opening is 
surrounded by a zone of reddish pigment. From the pneumatophore 
hang digitiform appendages into the cavity of the pneumatocyst, as 
in the genus Rhizophysa. The walls of both pneumatocyst and pneu- 
matophore are thin. At the base of the pneumatocyst the stem becomes 
