NS 
~ 
Fig. 11.—TuHe “Mammary Line” (/.m.) IN THE Pic’s EMBRYO AT DIFFERENT 
Staces. (After O. Schultze.) 
A, embryo I, 5 cm. (from head to coccyx) ; B, embryo I, 7 cm. long ; 
C, embryo I, 9 cm. long. 
