Plate 



XXXIII. 



XXXIV. 



XXXV. 



XXXVI. 



XXXVII. 



XXXVIII. 



XXXIX. 



XL. 



XLI. 



XLII. 



XLIII. 



XLIV. 



XLV. 



XLVI. 



XLVII. 



XLVIII. 



XLIX. 



L. 



XVlll 



Page 



New Species of Shells from Aden 390 



{. New Species of Shells from the 'Challenger' Expedition. 436 



Protective Mimicry in a Homopterons Insect 462 



Bird-bones from Corsica and Sardinia 467 



Pachyornis rothschildi 479 



Scorpana frondosa (Mauritius) 482 



New Species of Shells from Australia, New Guinea,! .„f. 



and the Caroline and Solomon Islands i 



Micro-Lepidoptera of the West Indies 492 



Spiders of St. Vincent 549 



> Structure of Ornithorhynchus 575 



European Tadpoles ( Rana) ^ 



European Tadpoles {Hyla, Bvfo, Pelobates) ( -„„ 



European Tadpoles {Pelodytes, Discoglossus, Bonibi- f 



nator, Alytes) -' 



New Butterflies from British East Africa 633 



GamasideB from Ants' Nests 638 



