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Show 624 REV. O. P. CAMBRIDGE ON [Nov. 18 closely grouped together and varied a little in their relative position, and the Spider itself was smaller. The above examples are in the British Museum, and were kindly submitted to me by Mr. Pocock. Two nests accompanied them, one of which was exactly like the one described (P. Z. S. 1889, p. 250) ; the other was a little different, though not more so than might be quite consistent with the identity of their species. Hab. Bahia. Genus M I G A S , L. Koch. MIGAS PARADOXUS, L. Koch, Arachn. Austr. i. p. 467A- xxxvi. f. 1. An adult female of this Spider from New Zealand was contained in the collection submitted to me by Mr. F. Taylor, as well as one of its trapdoor nests (Plate LIII. fig. 3) found at the roots of fern. It was about an inch and a half in length, covered with particles of soil and decayed vegetable matter, and protected by a thin wafer-lid attached by a weak silken hinge. I do not believe that the nest of this Spider has been described before, and its being found attached to the roots of fern, where the Spider could obtain a suitable position without itself excavating an independent hole in the soil, is quite in accordance with the absence of those strong spines at the extremity of the falces with which Spiders whose known habits are to excavate their dwellings in the hard soil are invariably furnished. Family DRASSID-E. PLATYOIDES, gen. nov. Cephalothorax a little longer than broad, broadest behind, flattened above, the caput and thorax being on the same level; normal indentations distinct but not strong, except the thoracic indentation, which is rather long and deep. Eyes in two transverse, slightly curved rows, the convexity of which is directed forwards, the anterior row shortest and close to the lower margin of the clypeus; small and not greatly differing in size; the hind centrals slightly smallest and wider apart, as well as forming a longer line than those of the fore central pair. Those of the lateral pairs seated on slight tubercles. The four centrals form a square whose posterior side is longer than the rest. The hind centrals are much nearer to each other than each is to the hind lateral on its side, and the same holds good, though in a less degree, in respect to the fore central eyes. Falces long, projecting, abruptly prominent above towards the base, divergent, and thickly furnished with hairs on their inner sides. The fang is long, sharp-pointed, and much curved. Legs moderately long, and not differing very greatly in length, 4, 2, 1, 3. The coxae and genuae are of rather unusual comparative length, especially the coxae of the fourth pair, which are double the length of those of the first pair, while the genua of the second pair is the longest and that of the third pair the shortest. The tarsi are all very short, and terminate with two curved claws, each furnished |