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Show 1879.] REV. O. P. CAMBRIDGE ON NEW ARANEIDEA. 283 separating these being about equal to the width of the cephalothorax. The intermediate spines are of moderate length, stout, but very slightly tapering, and directed a little backwards ; not far behind each of these is one of the posterior spines, which are very small and of a sharp-pointed conical form, and directed more outwards than backwards. The abdomen is of a dark yellowish brown hue, the sigilla and spines deep red-brown. The sigilla on the posterior margin are abnormal, being 10 in number instead of the usual number 9-three large on each side, with four small ones between : those on the anterior margin appeared to be normal in number (i. e. 10) ; but, owing to the injured state of that part of the abdomen, I cannot speak positively on the point. The cephalothorax is dull black, clothed with coarse, dull, greyish yellow pubescence; and the legs dark reddish brown, clothed with hairs of a dull greyish yellow hue. Hab. Laos. GASTERACANTHA FRONTATA. (Plate XXVL fig. 5.) Gasteracantha frontata, Blackw. Ann. & Mag. N. II. ser. 3, vol. xiv. p. 40. Length of the transverse diameter of the adult female, exclusive of the spines, 5f lines ; longitudinal diameter nearly 2\ lines. This Spider is another species of the "fornicata" group, but may be distinguished at once by the shortness and stoutness of the inter-termediate spines, which are very slightly directed backwards. The colour of the cephalothorax and legs is deep brown, the abdomen yellow, with, in some examples, a narrow, transverse, blackish bar connecting the anterior and two of the central sigilla; the part of the abdomen from which the posterior spines spring is dark yellow-brown, with a roundish yellow central blotch ; the underside is deep brown, spotted with good-sized and distinct yellow spots ; the spines, and sigilla are reddish brown. The figure is drawn from the type specimen described by Mr, Blackwall (I. c). Hab. East Indies. GASTERACANTHA PECCANS, sp. n. (Plate XXVL fig. 6.) Adult female : length of the transverse diameter, exclusive of the spines, 4| lines ; longitudinal diameter rather over 2 | lines. In the general form of the abdomen this Spider is much like G. madagascariensis,Yms.; but it differs totally in colours and markings; and the intermediate spines are shorter, much stronger, and straight; they taper also to a sharp point, not by a straight but by a curvilinear convex outline ; the posterior spines also are shorter, and those of the anterior pair are almost rudimentary; the intermediate spines are directed a little backwards. The upperside of the abdomen is yellow tinged with brown, the two exterior sigilla at each end of the posterior row of 8 are surrounded with a blackish patch touching the abdominal margin; the two hinder sigilla also of the central four are each similarly encircled. The underside of the abdomen is black- |