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Show 698 REV. O. P. CAMBRIDGE ON NEW [Nov. 18, Received among other New-Zealand Spiders from Capt. F. W. Hutton. ? Genus S T E G O S O M A , Cambr. ? S T E G O S O M A O U A D R A T U M , sp. n. (Plate LIII. fig. 15.) Adult female, length slightly over 1 line. The cephalothorax is yellow-brown, darkest on the sides of the thoracic portion, which is also depressed, while the caput is elevated and its fore extremity produced and prominent; its slope at the occiput is abrupt and the clypeus is greatly impressed. The surface has the appearance of being thickly covered with minute shallow, but not very well-defined, pock-like marks, and the caput is clothed with coarse hairs. The eyes occupy the whole of the fore part of the prominence of the caput; they are rather unequal in size ; the four centrals form a largisb square figure, the anterior (or fore-central) pair being much the largest; those of each lateral pair are contiguous to each other, and placed on the side of the prominence and rather far back, so that the hind-laterals come in a straight line with the hind-centrals, even if not a little further back still, and the intervals between those of the posterior row are nearly about equal. The legs are short, rather strong, 4, 1, 2, 3. They are of a brownish-yellow colour, broadly, but not very distinctly annulated with deep brown, and are clothed with coarse hairs and slender bristles only. The palpi are short and similar in colour and armature to the legs. The falces are small, straight, parallel, and of a dull yellowish-brown bue. The maxillee are small and greatly inclined over the labium, which is of an oval form, somewhat blunt-pointed at the apex ; these parts are of a paler hue than the falces. The sternum is of a subtriangular heart-shape, dark brown, thickly covered with shallow pock-marks and clothed with coarse hairs. The abdomen is very large, of a somewhat quadrate form, flatfish on the upperside and with a steep hinder slope; the latter marked with several distinct transverse folds in the cuticle towards the spinners. On each side of the hinder extremity above is a large blunt-pointed subconical prominence, directed outwards and backwards. At each corner of the fore extremity is a very much smaller somewhat angular prominence, and about halfway between each of these and the large posterior one is another of the same size. The whole of the surface of the abdomen is thickly covered with minute circular, somewhat shining pock-like marks; but in the absence of a high magnifying-power I could not satisfactorily determine whether they are actually depressed or not; the abdominal surface is also clothed with very short hairs. The colours and markings of the abdomen appear to vary considerably in different examples. In the one figured the whole of the underside and the greater part (forwards) of the upperside is of a deep brownish-black hue, marked with three spots, in the form of a |