^{page 345 note *} Mr. H. N. Dickson, of Oxford, has been kind enough to undertake the analysis of my water samples.

^{page 347 note *} Haeckel (Challenger Report) describes C. pelagicum as having small, irregularly shaped central capsules, transparent and without oil globules, often many extracapsular vesicles in the jelly body. Membrane very thin and delicate. Diameter of central capsules, ·02-·08 mm.

^{page 348 note *} Die Koloniebildenden Radiolarien.

^{page 348 note †} This does not appear to be an accidental occurrence, but a constant association.

^{page 349 note *} Challenger Report, “Radiolaria,” p. 26.

^{page 353 note *} The dissection of this membrane from the central capsule is very easily accomplished without previous treatment of the specimen.

^{page 356 note *} In my experience no method of preservation retains the form of the animal in such a normal condition as the well-known 5 per cent, formalin. Specimens may be observed in detail on shore when opportunities fail—as they usually do—at sea, within a few weeks with practical certainty that the organisms have retained their normal condition. Spirit or other preservative certainly distorts to a considerable extent.

^{page 359 note *} In some hauls, e.g. Station A1, in August, 1900, they were captured in great quantity in the Mesoplankton, chiefly at 350 fathoms.

^{page 361 note *} The Copepoda of the Faröe Channel will form the subject of a subsequent monograph.

^{page 362 note *} Eucalanus crassus, Pleuromma robusta, Ægisthus, Augaptilus I found in Fowler's collection, the two first also occurring in my own tow-nettings.

^{page 366 note *} The nearest related genus is Gaetanus (Giesbrecht), but this Copepod is removed from it by the absence of any median spine on the head. The indistinct traces of segmentation of the first and second feet cause it to approach the genus Gaetanus, while the lamellæ of the fourth feet (basal joint) again differentiate it. On the whole, it approaches more nearly to Gaidius than Gaetanus.