. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 10 DISCOVERY REPORTS me to conclude that Sulculeolaria quadridentata is identical with S. quadrivalvis (see Systematic Notes, p. 109). Finally, I have picked out thirty-three species of Siphonophores from ten of the stations made in 1950-1 by ' Discovery II' along a line in longitude 900 E. The finding at Station 2895 in surface waters of Sulculeolaria biloba led to a long-needed revision of the old genus Galetta and its submergence in Sulculeolaria. It is comparatively easy to preserve Siphonop
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 10 DISCOVERY REPORTS me to conclude that Sulculeolaria quadridentata is identical with S. quadrivalvis (see Systematic Notes, p. 109). Finally, I have picked out thirty-three species of Siphonophores from ten of the stations made in 1950-1 by ' Discovery II' along a line in longitude 900 E. The finding at Station 2895 in surface waters of Sulculeolaria biloba led to a long-needed revision of the old genus Galetta and its submergence in Sulculeolaria. It is comparatively easy to preserve Siphonophora in good condition for morphological work, if not for exhibition. They can be engulfed at the surface of a calm sea in a bottle, or picked out with a dip- net, and they should be isolated unless very small. Two or three or more live specimens of a species such as Rosacea cymbiformis, if kept in ajar, soon become inextricably entangled. The use of an isotonic. Chart. Stations in the Gulf of Aden occupied by 'Mabahiss', 'Discovery II' and Mr Fraser-Brunner. solution of magnesium chloride makes it possible to achieve a good deal of relaxation of muscles and consequent expansion before killing in formalin, which should contain at least 5 % formaldehyde. It is advisable to add 2 lb. of hexamine (hexamethylenetetramine) to each gallon of 38-40 % formalde- hyde solution to buffer it. Before subsequent examination it is a good plan to stain for a day or two with dilute Grenacher's Borax-carmine. A little of this stain can be added to the jar in which the specimens are preserved. For examination of the external form of nectophores and bracts, brief staining in dilute Delafield's haematoxylin is effective, but if hexamine has been used the specimens must first be thoroughly washed or the stain will be precipitated. To photograph them alive is exceedingly difficult because of the lack of contrast, the depth of the field that it is necessary to cover, and their constant change of form
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