XX CONTENTS. 
ILLUSTRATIONS. 
Plates I., II., III. Zebra-Horse Hybrids 
«Plate IV. Natterer’s Bat (Vespertilio natterert) 
», WV. Leathery Turtle (Dermochelys coriacea) 
Stridulating organ of Harpactira chrysogaster 
iy + Phoneyusa sp. 
Malformed Codfish (Gadus morrhua) 
Varietal coloration in Sand Shrimp (Crangon vulgaris) 
Wing of Sparrow (Passer domesticus) . 
Nest of Social Spider (Stegodyphus gregarwus) 
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