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Show xvm Plate Page XXXIII. New Species of Shells from Aden 390 X^?I^'l New Species of Shells from the'Challenger'Expedition. 436 XXXVI. Protective Mimicry in a Homopterous Insect 462 XXXVII. Bird-bones from Corsica and Sardinia 467 XXXVIII. Pachyornis rothschildi 479 XXXIX. Scorpeena frondosa (Mauritius) 482 XL. New Species of Shells from Australia, New Guinea, I .Q^ and the Caroline and Solomon Islands i XLI. Micro-Lepidoptera of the West Indies 492 XLII. Spiders of St. Vincent 549 ' > Structure of Ornithorhynchus 575 XLV. European Tadpoles (Bana), XLVI. European Tadpoles {Hyla, Bvfo, Pelobates) (_ rgo XLVII. European Tadpoles (Pelodytes, Discoglossus, Bombi-f nator, Alytes) XLVTII. New Butterflies from British East Africa 633 XLIX. I Qamasida> from Ants' Nests 638 L. |