54 EDWARD T. BROWNE. 
to alcohol, as the storage room on the ship was below freezing point. These specimens 
have now heen preserved about six years, and the tissues are still in good condition, 
and the mesoglea remains transparent and pliable. The jar contained at least three 
specimens. 
Specimen A.—The umbrella is about 60 mm. in diameter, and it is unbroken, 
though the margin is torn away and the whole of the mouth. This is, however, a 
valuable specimen, as it is the only one showing the gonads in situ, and they are in 
good condition. 
Specimen B.—This specimen is represented by one-half of the umbrella, with 
about eight rhopalia and eight tentacles. The diameter of the umbrella is estimated 
at about 70 mm. 
Specimen C.—This one consists of only one-half of the umbrella, with seven 
rhopalia. The diameter of the umbrella is estimated at about 75 mm. From the 
appearance of the radial canals, Specimens B and C belong to different Meduse, and 
not to one Medusa torn in half. In addition to the above there are four fragments 
belonging to the margin of the umbrella, with tentacles and rhopalia. These fragments 
may be parts of the above specimens, or of other specimens. 
Description of the Adult.—The umbrella is thin and probably slightly convex in 
shape. The margin of the mouth is studded with warts and short protuberances 
containing nematocysts. The fragments belonging to the mouth are from the margin 
of a large mouth with either four lips, or four short arms, about 35 mm. in length, 
something like the oral arms of Aurelia aurita, but thinner and more membrane-like. 
The stomach is a flat circular cavity, about two-thirds the diameter of the umbrella, 
and its lower side is covered with a moderately thick layer of mesoglea. 
In a normal specimen 32 radial canals should leave the stomach. Sixteen of these 
belong to the rhopaliar series and are branched, and sixteen to the tentacular series 
and are unbranched. All the radial canals communicate with a circular canal and also 
with one another by meaus of an irregular anastomosing network of canals near the 
periphery of the umbrella (Plate VI. fig. 3). The rhopaliar canals have opposite 
lateral branches, which are irregular in their position on the main canal. In the 
adult the primary lateral branches have not unfrequently lost their connection 
with the main canal, and are in direct communication with the stomach. This is 
evidently due to the outward growth of the periphery of the stomach cutting off the 
proximal portion of the radial canals, including the junctions of the branches. (In 
Aurelia aurita it is not unusual to find the interradial branched canals isolated from 
their main canal, which then runs as a straight isolated canal from the stomach to the 
sense organ.) The main rhopaliar canals have frequently secondary lateral branches, 
which originate nearer the margin of the umbrella. The secondary branches were not 
present in the ephyra stages, and were only seen in the adults. 
The gonads begin to make their appearance in the meta-ephyra stage, and are 
then indicated by a very narrow band on the outer side of the gastric filaments. As 
