XVlll 



Plate Page 



XXXIII. New Species of Shells from Aden 390 



XXXIV I 



^^ ' > New Species of Shells from the 'Challenger' Expedition. 436 



XXXVI. Protective Mimicry in a Homopterous Insect 4G2 



XXXVII. Bird-bones from Corsica and Sardinia 467 



XXXVIII. Pachyornis rothscMldi 479 



XXXIX. Scorpaina frondosa (Mauritius) 482 



XL. New Species of Shells from Australia, New Guinea,) ,np 

 and the Caroline and Solomon Islands ....... A 



XLI. Micro-Lepidoptera of the West Indies 492 



XLII. Spiders of St. Vincent 549 



^ ' \ Structure of Ornithorhynchus 575 



XLV. European Tadpoles {Bana) 1 



XLVI. European Tadpoles (ffy^a, -Bjf/b, Pe/o6a^es) ( p-go 



XLVIL European Tadpoles {Pelodytes, Discoglossus, J3ombi-{ 



nator, Alytes) -' 



XLVIII. New Butterflies from British East Africa 633 



XLIX. 1 QamasidcB from Ants' Nests 638 



L.i 



