Hayes.] 424 [March 18, 



each otiier. The black goat is only of a sizs about a fifth larger 

 than the white goat. The weight of the fleeces of the black race 

 varies between three and four ocques (3 kil. 750 to 5 kll.). The hair, 

 black, straight and without undulation reaches a length of 0.27 m. 

 . . . The length of the locks of the white race reach 0.25 m. and 

 the weight of the best fleeces two ocques (2 kil. 500)." M. Boulier 

 cites two examples to show that the introduction of the wliite female 

 goats into the country where they have not previously existed is not 

 regarded b}" the natives as the most simple and rapid means of 

 acquiring the more precious race. "Seventy years ago. at Zchiftela 

 Gentchibe Yallaci, the natives possessed no white goats. Since that 

 period they have crossed the black female goats of the village with 

 the buck of the white race, and at present there are not less than 

 eight thousand goats of the latter race, upon the territory of that dis- 

 trict. We have examined the flocks, and the fleeces are in no respect 

 inferior to any of those which we have seen elsewhere. It is now 

 established in resjiect to these new generations that after three 

 years of experience the newly crossed race has not degenerated; it 

 is distinctly established, since for a long time the regenerators are 

 taken from the flocks themselves. At Sidi Ghazi the crossing by the 

 fame procedure has been commenced within only six years. The 

 tlocks are magnificent." The eff'ects of the ci'ossing in the successive 

 generations ai'e thus detailed: — 



"1. The cross of a black female goat with a white buck will pre- 

 sent a fleece marbled with a yellow color upon an impure Avhite found- 

 ation. The flanks, the shoulders and the head will preserve more 

 particularl}' the marks of the color of the mother; the fineness of the 

 fleece will be sensibly ameliorated. 



2. The cross of this first product with a white buck will cause all 

 the dark tints to disappear. The fleece will become white. The 

 shoulders and the flanks will be covered with wavy ringlets; but the 

 whole line of the back, and the forehead will remain furnished with 

 coarse, straight hairs. 



3. On coupling this new cross always with a buck of the pure 

 race we shall obtain a greater fineness in the long ringlets of the 

 flanks and shoulders; the dorso-lumbar portion of the vertebral col- 

 umn v.-ill no longer retain coarse iiairs which will remain still on the 

 upper part of the neck and forehead. 



4. A fourth cross, carried on with the same precautions as before, 

 will fix a stamp of purity to the product; the coarse hairs will have 

 disappeared on the forehead and neck. 



5. The consecutive crossings will render more stable the modifica- 

 tions already formed, and already after the fifth generation the indi- 



