Mr. J. W. Fewkes on Angelopsis. 149 
the voluminous pneumatophore, the powerful horizontal 
corona of radially expanded nectophores, and particularly the 
singular aurophores, wanting in all other Siphonophore, and 
acting probably as an important gas-secreting gland or a 
pneumadenia.” It is certainly difficult to see how any of the 
above-mentioned features “ make it probable that the Auro- 
nectz are permanent deep-sea Siphonophore . . . but never 
come to the surface.” One might even suggest that exactly 
the reverse conclusion might be drawn and that some of these 
features imply life at or near the surface. 
The failure to find nectocalyces in Angelopsis led me to 
suppose that these organs or individuals are wanting in this 
genus. I cannot now say that they are present, as they are 
also not found in the new specimen which I have lately 
studied. As Heckel found them in the same bottles with 
his Auralia* and Rhodalia, it is possible that they once 
existed in Angelopsis, and future studies may bring them to 
light. 
The following general description of Angelopsis was given 
in my original account f of this Medusa :— 
“This Medusa has a spherical region above, which is con- 
sidered [to be] a float, on the underside of which is clustered a 
number of small bodies resembling tentacles. The former 
region ( py.cy.) resembles the bell-like body in a Medusa; the 
latter a clump of tentacles closely massed together, with the 
form which we might suppose they would have if the entrance 
to the bell-cavity were closed by the velum and tentacles deve- 
loped over its lower floor. The so-called float is spherical, 
without apical opening or protuberance, smooth on the outer 
surface and without radial elevations. Diameter from 7 to 10 
millim. The wall of the float is thin, and in the interior is a 
second thin-walled sac or float, which is supposed to corre- 
spond to the pneumatocyst ( py cy.) of Rhizophysa. The inner 
sac has no opening into the outer, and does not communicate 
with organs below. It is destitute of appendages. Its cavity 
(cav. p.) occupies the whole interior of the float. 
“The lower floor of the float is formed of the thickened 
outer walls which bear the so-called tentacles. The thick- 
ened region is found to have a cavity within (cav. 6.) and to 
* Heckel simply says that the corona of nectocalyces (nectophores) 
is simple in Auraka, but gives no more information about them in this 
genus. He gives no account of their anatomy, whether they were sessile 
or pedunculate, or any detail of any scientific value about them. His 
description of Awralia is so superficial that it is very difficult to tell 
whether it is the same as or different from Azgelopsis. 
+ “Report on the Medusz collected in 1883-84,” Ann. Rep. U.S. 
Fish Comm. 1884, 
