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Show 6^8 MR. J. W. CLARK ON DELPHINUS ALBIROSTRIS. [Julie 20, four minute black bristles on either side, set in a line parallel to lower edge of the lip, and a quarter of an inch apart. The longest of these measured one sixteenth of an inch. The crescentic aperture of the blow-hole, 1^ inch in width, was placed directly over the eyes. The general form of the animal will be best understood from the figure (Plate LXVI. fig. 2), taken partly from a photograph and partly from notes and measurements made by myself. The coloration was singularly beautiful, and I fear that no drawing can give any adequate idea of it. The upper part of the body generally was a glossy black, and the under a creamy white. The upper lip (before described) was white, with a black spot at the tip, and a few irregular pale grey cloudings on its surface. The convex forehead was at first white for half au inch on the right side, and a quarter of an inch on the left; this white space was bounded by a wavy line of black spots of different dimensions, including a subtriangular space of a brownish colour, 2 inches broad, dotted with darker spots. Immediately behind the blow-hole was an ogee of black, 1^ inch deep, succeeded by a space of light brown colour 8| inches wide by 9 inches deep. Beyond this the whole upper surface of the body was black till about 18 inches from the tail, when it became grey. At a point 10 inches from the centre of the tail this grey ceased, and the tail became black above and below. The underside of the caudal fin was irregularly streaked with grey ; and there was a white spot on the raphe. Behind the eye and just above the pectoral fin was an irregular patch of light yellowish-brown flecked with numberless spots and dashes of brown of more than one shade, with an occasional black mark. There was a long narrow band above this and between it and the dorsal fin, sparingly spotted; and a second space, marked like the first, commenced at about the middle of the band aud extended backwards to a point halfway between that and the tail. The markings upon both of these cannot be better described than by comparing them with those upon a sheet of blotting-paper that has'been much used. They were thickest at the sides of the space, of which a small portion, just in the centre, was free from markings altogether. Between these spaces the black was less intense ; a band of it, however, extended between the second space and the white of the belly. The pectorals were black above and below; and a few grey mar kings, which maintained a uniform width of about 6 inches, extended beneath them over the white undersurface of the body, till at the anus the dark grey colour of the sides curved downwards and narrowed the white to less than half its width. Behind the anus there was a patch of light brown about 6 inches long, succeeded by black as described above. Skeleton.-The condition of the bones when macerated showed at once that the animal was a very young one. All the epiphyses were distinct; the transverse processes of the ribs and the terminal cartilages of the scapulae were unossified ; and the bones themselves were quite soft and spongy. The total number of vertebrae is 90 or 91, which may be divided |