518 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [6] 
to be the line of attachment of nectocalices. In a large number of 
specimens, however, no sign of a nectocalyx was discovered. 
The distal end of the anterior stem (portion from which the knobs 
arise) is marked by a cluster of spherical or club-shaped bodies, which 
in some of the specimens have a reddish color even in alcohol. These 
botryoidal clusters resemble sexual bodies. The distal region of the 
stem from the cluster of bodies last mentioned is much longer than 
the anterior, and bears on one side a double row of flask-shaped bodies 
closely crowded together. These bodies are fimbriated on one side by 
small lateral appendages, and are thought to be polypites. Notentacles 
were observed, and no clusters of sexual bodies or immature tentacular 
knobs at the bases of the polypites. Noclusters of sexual bodies on the 
axis between the union of the supposed polypites and the axis. 
The polyp stem is spirally coiled in many of the specimens. No 
hydrophyllia. Tasters, unknown. 
It must be said that the interpretation given to the different organs 
which has been given above is somewhat conjectural. Of the float, 
stem, and polypites there can be little doubt. It seems probable that 
the cluster of bodies which separate the anterior stem from the polyp 
stem are sexual bodies. 
The nectocalices and hydrophyllia are easily ruptured from the stem, 
and their absence may simply be due to this fact. It seems strange 
that among so many specimens not even a fragment of these bodies is 
found, while in.specimens of Agalma, collected by the same collectors, 
these gelatinous structures are well preserved. We shall, therefore, 
look with interest to a new collection of Pleurophysa and a study of 
better-preserved specimens for anatomical details, which this account 
necessarily leaves in great imperfection. 
Family PHYSALIADZ. 
PHYSALIA ARETHUSA, Tilesius. 
This physophore is one of the most commonly collected of all the 
siphonophores of the Gulf Stream. In the collections of 1885-86 it is 
recorded from the following localities : 




Catelonue Station. | North latitude. | West longitude. 
| | ° ‘ uw °o | “a 
116387 2566 a7 -23 00 68 08 00 
11639 2567 37 45 00 66 56 00 
15233 2711 38 59 00 70 O7 00 
15255 2712 38 20 00 70 05 30 
15754 2723 36 47 00 73. 09 30 
15755 2725 36 34 00 73 48 00 
15762 2727 86 35 00 74 08 30 


EE 
