Balæna biscayensis (part.), _Van Beneden_, _Ostéogr. Cét._ tab. 7. fig. 1 (animal), figs. 8-11 (nuchal vertebræ), figs. 2, 3 (? vertebræ). Inhab. Mediterranean, I. St. Marguerite (_Lacépède_). 3. Balæna angulata. B.M. Balæna, mysticetus, var. angulata, _Gray_, _Cat. Seals & Whales_, p. 86, f. 5 (ear-bones). Inhab. North Sea? Ear-bones, British Museum. 4. Balæna nordcaper. Balæna nordcaper, _Bonnat_. Balæna islandica, _Brisson_. Balæna biscayensis, _Eschricht_. Balæna mysticetus, var., _Brown_, _P. Z. S._ 1868. p. 546. Inhab. Iceland. Called “Slet-bag.” It has been ascertained, “1st, that it is much more active than the Greenland Whale, much quicker and more violent in its movements, and accordingly both more difficult and dangerous to capture; 2nd, that it is smaller (it being, however, impossible to give an exact statement of its length) and has much less blubber; 3rd, that its head is shorter, and that its whalebone is comparatively small and scarcely more than half the length of that of the _B. mysticetus_; 4th, that it is regularly infested with a cirriped belonging to the genus _Coronula_, and that it belongs to the temperate North Atlantic as exclusively as the _B. mysticetus_ belongs to the icy sea.”—_Dr. Brown_, _P. Z. S._ 1868, p. 546. Dr. Brown says that barnacles are looked upon as a sign of age in a Whale; and he considers that a considerable portion of the description of the _nordcaper_ corresponds with what he has said of the Spitsbergen whale (P. Z. S. 1868, p. 547). See also:— 1. Balæna mysticetus, _Cope_, _Proc. Acad. N. S. Philad._ 1869, pp. 17 & 35. The Bow-headed Whale, Scammond, _American whalers_. Inhab. Behring’s Straits. 2. Balæna kuliomoch, _Chamisso_, _Nov. Acta Natur._ tab. 7. fig. 1; _Gray_, _Ann. & Mag. N. H._ 1870, vi. p. 202. Balæna cullamacha, _Chamisso_, _Nov. Act._ xii. p. 251, t. ⸺; _Cope_, _Proc. Acad. Phil._ 1868, p. 225, 1869, pp. 14, 17 & 40, fig. 4. Inhab. North Pacific. From wooden model made by the Aleutians. 2. NEOBALÆNA. Skull rather depressed; brain-cavity nearly as long as the beak, depressed, much expanded on the sides, with a very deep notch on the middle of each side over the condyles of the lower jaw, and with a subtriangular crown-plate. The nose as broad as the expanded brain-cavity at the base, regularly attenuated to a fine point in front, and slightly arched downwards. Lower jaw laminar, compressed, high; the upper edge thin, and inflexed the greater part of its length, erect in front; the lower edge inflexed in front, the rest of the edge being simple. The baleen elongate, slender, several times as long as broad, with a fringe of a single series of fine fibres; enamelled surface smooth and polished, thick. [Illustration: Figs. 1 & 2. Side view and top view of the skull of _Neobalæna marginata_, from Dr. Hector’s figures.]