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Show 296 SIR C. ELIOT ON NUDIBRANCHS [Nov. 29, recorded from the Philippines. The specific characters appeal- to he the coloration, the planarian-like shape, and the elongate smooth teeth. E l y s ia m a r g in a ta Pease. (Plate XVI. figs. 7 & 8; and Plate XVII. fig. 18.) [Pease, Amer. Journ. of Concliology, 1871, vol. vi. p. 304 ; cf. Bergh, Jour. Mus. Godeffroy, Heft ii. 1873, p. 80, on Elysia nigrocincta.] The following are notes on living specimens captured at Zanzibar:- 1. " Extreme length 1*5 cm. General colour a dull green, but on the surface are opaque black and white spots. The tentacles and edges of the wings are bordered with orange-yellow, white, and on the extreme edge black. The white line is irregular. Internally the edges of the wing are blotched with white. Each black spot has a corresponding orange spot just beneath." (Vide figures 7 & 8, PI. XVI.) 2. " In a second specimen the orange line round the wings was much broken, perhaps a step towards its disappearance." 3. " Rather more than an inch long, when fully extended. Tentacles and wings edged with a double border of orange and black, which is interrupted at the neck. Whole body spotted with small black flecks. Head and auriform tentacles very large. Pericardial bulb prominent. Inside of wings not striated, but the veins can be seen beneath the skin." 4. " Green, without black spots, but wings bordered with a double line of orange and black. Length about one inch." Unfortunately, only the second and fourth of these specimens have been preserved. As preserved, the latter is 11 mm. long and 6 high, the wings being raised, not spread out, but applied to one another. The colour is olive-green: the borders have disappeared, but the outside of the wings is covered with numerous yellowish-white spots, and there are a few inside. The tentacles are short and thickish, with traces of black about the groove. The wings are rather thick, not much indented at the edges, and the posterior expansion is not ample. The pericardial prominence is distinct, and the anus lies to the right side of it. The inside of the wings is smooth and does not bear ridges, but where the animal is sufficiently thin to be transparent, veins can be seen radiating from the pericardium. The foot is not distinctly divided from the body, and the front part is hardly differentiated from the rest. The radula consists of 14 teeth, and there are about 12 more of very varying sizes lying in a heap. The teeth are as in Bergh's plates of E. nigropunctata (I.e. pi. xi. fig. 10* and pi. xii. 1), but seem somewhat more slender. There is no trace of denticulation. The second specimen is 7-5 mm. long, 7 broad when the wings are * There seems to be a mistake in the explanation of this plate figs 13-^6 apparently referring to Cyerce and not to E. nigropunctata as stated. ' ' |