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Show 682 REV. O. P. CAMBRIDGE ON NEW [Nov. 18, few years from New Zealand by Captain F.W.Hutton, and of another collection brought to me from the same region of the world, in 1878, by Mr. A S. Atkinson. Those selected for present record are, I believe, all new to science, excepting two species-Robsonia marina (Hector), remarkable for its submarine habits, and Walckena'era cristata, Bl. The occurrence of this latter Spider is very interesting, as being the first species of an extensive European, Nortb-American, and North-Asiatic group as yet found in any part of Australasia. Another Spider now recorded (Episinus antipodianus, sp. n., p, 701) appears to me to indicate the true systematic position of the genus to which it belongs. The genus Episinus, Walck., represented at present by five or six species only (and those mostly European), has hitherto been included in the family Theridiides ; it has always, however, seemed to me to have little real affinity with the typical Spiders of that group, but to be more nearly allied to the Thomisides, as connected with them through the peculiarly Australasian genus Stephanopis, Cambr. An undoubted species of Episinus having now occurred in New Zealand (where Stephanopis is also found), I have ventured to place the former near to the latter, though (owing to a difference in the number of the tarsal claws, and for other reasons) in a distinct family, Episinides. Fam. THERAPHOSIDES. Genus ARBANITIS, L. Koch. ARBANITIS HUTTONII, sp. n. (Plate LII. fig. 1.) Adult male, length rather less than 4\ lines. This Spider is nearly allied to Nemesia gilliesii, Cambr. (Trans. N. Zeal. Instit. x. p. 281, pi. x.), resembling it in general appearance, colours, and markings. It may, however, be easily distinguished by its much smaller size. The cephalothorax is darker-coloured. The legs of the first pair are darker, being of a reddish yellow-brown hue, the tibiae distinctly darker than the rest; the metatarsi also of the first pair are straight, instead of sinuously curved, and shorter than in N. gilliesii. When looked at in profile the occiput is more gibbous, as also is the posterior margin of the thoracic indentation. The radial joint of tbe palpus is very large and of a similarly tumid form, but the external edges of tbe large chasm (or cleft) on tbe outer side are not nearly so thickly studded with short spines or denticulations ; in fact the denticulse on the upper edge form only an imperfect single row, whereas those on the corresponding part in N. gilliesii are smaller, but much more numerous; on the lower edge tbey are short, strong, and conical, forming two irregular rows only, and numbering only 18 to 20, whereas in JV.gilliesii they are smaller, but densely grouped, and quite past counting. The digital joint has on the upperside numerous, rather obtuse, straight, not very long spines, but all of equal length, with a few on the fore part of the upperside of the radial joint; whereas on the radial joint of N.gilliesii there are no spines, and but very few, mingled with numerous hairs and some bristles, on the digital joint. The |