Figs. 11 and 12. Mammals' 

 skins spread out to show oblit- 

 erative-shading. 



Fig. 11. Spotted Seal {Phoca 

 vitulina.) 



Fig. 12. Cotton-tail Rabbit 

 {Ijmus floridanvs tranaitionalis.) 

 [CfT above.] 



Fig. 13. Birds' and mammals' skins spread out to show obliterative-shading, continued. The 

 species are as follows: Beginning above, left, Blue Jay {Cyanoeitta cristata), Tree Swallow {Tachycinetta 

 bicolor)f Pine Grosbeak {Plnicola enucleator canadensis, female), Common Chipmunk {Tamins striatus) 

 Mink {PatoHus vison), English Sparrow {Passer domesHcus, female), Lesser Whitethroat (Sylvia citr- 

 I'uca), two kinds of shrew-mole, names (?) jumping mouse {Zapus hvdsoniiis, stuffed skin side view) 

 Am. Siskin (Spmus pmus) , Gray Squirrel (A'cruriM caroiiwenffw), Muskrat {Fiber zihetUeus) and sharp- 

 shinned Hawk {Accvpiter velox, young female). ' 



