ERRATA

Brandt et al. 57:1392. In Table 3 age of breed group Hx(S x H) should be 25.6.

Satter et al. 58:521. Manuscript received De- cember 10, 1973.

Maubois and Mocquot. 58:1002. Figures should be interchanged with legends for Fig. 3 and 4. Figure in the lower right col- umn on page 1002 should have legend Fig. 4.

1958