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Show 726 MR. E. O. PICKARD CAMBRIDGE ON [Juue 16, I am unable to satisfy myself that P. scruposa, E. Sim., $, op. clt., is identical with the species now before me. The description shows that they are undoubtedly closely allied; but of P. scruposa M . Simon says : " Tarso 2 parls Intus, prope aplcem, aculeo unlco Instructls." The tarsi of the second pair in P. papllllgera have not this apical spine. H e also says : " Abdomen-aculeis bacilli-formls fulvls elevatis paucls, In series transversas parum regulariter ordlnatis, munitum," and makes no mention of the regular transverse rows of tubercles, each of which bears a bacilliform hair. I have therefore considered it more prudent, and less liable to cause subsequent confusion, to describe the present species as new. In any case the male is unknown to science, and would, on that account, merit a careful description. Note.-Since writing the above another female, 13 m m . long, and a smaller one have come to hand from amongst m y captures in the forest at Santarem. These specimens entirely bear out the distinctions made between Paratropis and Anisaspis, while at the same time proving how inconstant are the number and position of spines and cusps, and how unreliable, as a character, is even the dentition of the mandibles. The eyes are closer together; the spinners four in number; the legs longer in proportion. The anterior tarsi have only a single row of cusps on either side, but the cusps are more numerous than in the female above described. The fang-groove is furnished with 16 teeth on the inside and 2 supplementary ones towards the apex, and 14 on the outer margin. The number of teeth is thus greater by 2 in each row than in the type female. The female described above must still be held as the type, although the other is a finer specimen, for both male and female were found side by side under the same piece of wood. One cannot be thoroughly satisfied concerning the differential characters of these Spiders until more material is available for careful comparison. ANISASPOIDES, gen. nov. Generic Characters. Mamillai two. Terminal joint nearly double the length of basal. Inferior claw present on tarsi i. and ii., absent, on tarsi iii. ami Fang-groove furnished with two rows of 7-14 teeth respectively. ANISASPOIDES GIGANTEA, n. sp. (Plate XXXIV. figs. 2 & 22.) 2 . Hab. Breves, Lower Amazons. 12-75 m m . long. Type in coll. Brit. Mus. Nat. Hist. 2 .-Carapace a little longer than broad, purple-brown, finely granulate, and so closely encrusted with fine grit as to almost entirely obliterate all traces of the fine rufous hairs, of which there are three converging lines on the cephalic ridge, converging lines on the thoracic area, and a marginal line round the carapace. Central fovea deep, transverse, procurved. Abdomen encrusted with grit; bearing four rows of tubercles, |