100 Mr. R. M« Andrew on the Mollusca observed during a are almost in contact ; the posterior eyes of the quadrilateral figure are the largest, and the anterior ones are the smallest of the eight. Cephalo-thorax rounded on the sides, compressed before, elevated and convex in the cephalic region, depressed be-hind, glossy, and of a very dark brown colour, with a broad band in the middle, which decreases in breadth to its posterior extremity where it is yellowish white, the anterior part being yellowish brown. Falces powerful, conical, vertical, armed with teeth on the inner surface, and of a reddish brown colour, the base being the darkest. Maxillae short, straight, enlarged and rounded at the extremity : lip semicircular, but somewhat pointed. These parts are of a very dark brown colour, their extremities being faintly tinged with red. * Sternum heart-shaped, with small prominences on the sides, opposite to the insertion of the legs ; its colour is brownish black. Legs moderately long, provided with hairs and a few fine spines ; they are of a yellowish brown colour, the femora being marked with brown longitudinal streaks ; the first pair is the longest, then the second, and the third pair is the shortest; each tarsus is terminated by the customary number of claws of the usual structure. The palpi are short and of a yellowish brown colour, the radial and digital joints being the darkest. Abdomen oviform, convex above, projecting greatly over the base of the ce phalo -thorax ; it is of a pale yellowish brown colour on the upper part, and is marked with four minute brown spots which form a quadrilateral figure whose anterior side is the shortest ; a narrow, irregular, dark brown line extends along each side, from the anterior part, more than two-thirds of its length, and contiguous to the inferior margin of these lines, which are most distinct at their extremities, there is a parallel band of yellowish white ; the sides are dark brown freckled with paler brown, and the under part is brownish black, bounded laterally by a yellowish white band extending from the anterior extremity beyond the spinners; the sexual organs are almost concealed by a scale-like process situated on each side of them. The specimen of Ep'eira calva described above j^aSjj^j^^jl^ June at Interlacken. ton ouiinassiq irjY yddn-xda ii Ainf XI. — Note of the Mollusca observed during a short visit to the Canary and Madeira Islands, 5fc., in the months of April and May 1852. By R. M^Andrew, F.L.S. On the 13th of March I sailed from Liverpool in a small yacht, on a voyage undertaken to benefit the health of some members of my family. We reached Lisbon after a boisterous navigation often days passed without any occurrence worthy of note, and
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