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Show 1904.J FROM EAST AFRICA AND ZANZIBAR. 397 15 mm., breadth 7, height 8. The mantle-edge is narrow except over the head, where it is ample. The branchial opening is minute ; the branchiae are small, 10 in number, and apparently set in a perfect circle. The foot is rounded and grooved in front; the shape of the head is spatulate. The labial armature is a yellow ring of mace-like elements. The radula is small and transparent, the formula being about 35.0.35 x 80. The ordinary teeth are bifid, and all appear to have four denticles under the top hook. The innermost have one or two denticles on the inner side. The outermost are irregularly serrate (vide PI. XXIV. fig. 7). No rhachidian thickenings are to be seen. Although the published plates of Chr. lineata and Chr. hilaris are remarkably different, the scheme of coloration is much the same; and I think it probable that the two forms are really varieties of one species. 14. CHROMODORIS ? LINEATA, var. NIGROLINEATA. One specimen from Chuaka on the East Coast of Zanzibar. The notes on the living animal are as follows :-" Shape spatula-like. Dorsal side whitish at edges, lemon-yellow medianly with longitudinal black lines. Gills and rhinophores short, orange-red. Underside colourless, but edge of foot and mantle bright dark blue (not purple)." Size 18 m m . long, 6 m m . broad.. The alcoholic specimen is of a waxy white. There are only faint traces of the blue borders, but there are five distinct black lines on the back, two of which are divided again so as to form long loops. The mantle-edge is thick and narrow. It measures about 2 m m . over the head and tail, but is hardly distinguishable at the sides. The anterior end of the foot is rounded and grooved. The small branchiae are set in a circle and exposed. The buccal mass is small. The labial armature is transparent, and consists of rather irregulor short hooks, some cleft. The small transparent radula is as in Chr. hilaris. 15. CHROMODORIS ?MAGNIFICA Q. & G., var. One specimen from Zanzibar, dredged in 4 fathoms. The following are the notes on the living animal:-" 40 mm. by 10 m m . Elongate in form, fore end spatula-shaped. Colour white and rather translucent. Mantle with a thin yellow border, within which was a band of deep but brilliant violet, broadest in front and behind but broken laterally. There was also a violet line along the sides of the foot, and six longitudinal lines of deep chocolate-colour and different lengths along the back. They were surrounded by thin clear lines of opaque white. There was also a line of chocolate blotches along the side of the foot just below the shelf-like edges of the mantle. Branchiae 10, simply pinnate, with a band of orange-red along each side of each plume. Rhinophores a deeper tint of orange. The tail projected well behind the mantle and bore chocolate blotches." The alcoholic specimen is of a pale yellow, with the above- |