I06 INHERITANCE IN POULTRY. 



Pl<ATB II. 



Fig. 7. — The head of a Polish fowl, ^ 3, with skin on left half of head dissected away. 

 Shows cerebral hernia, and the relation to it of the thick skin and crest 

 feathers lying above. Note also the culminal fold, high nostril, and rudi- 

 mentary comb. The latter lies at the base of the comb and shows as a 

 mottled area against the deep black of the anterior crest feathers. 

 (H. A. H.) 



Fig. 8. — Head of a hybrid, ^ 50, between lUinorca $ 13 (iig. 3) ard Polish (^3 (fig. 7). 

 Shows the Y-shaped comb lying in front of the crest. The comb is double 

 behind, single in front. 



Fig. 9. — Head of a Minorca X Polish hybrid of the second generation. The son of such a 

 pair as are represented in figs. 5 and 6. Note the reappearance of a large 

 crest, high nostril, and rudimentary comb. (H. A. H.) 



Fig. 10. — Side of cranium of Polish fowl. Shows bony dome covering cerebral hernia. 



