. Carnegie Institution of Washington publication. DEVELOPMENT OF EXTERNAL NOSE IN WHITES AND NEGROES. 185 negroes. The racial difference in the relative interocular breadth is not con- stant during intrauterine growth. During the early part of the latter negroes show a relatively shorter distance between the eyes, but later it frequently exceeds this measurement in whites, and at birth and in postnatal life is always greater. (See curves in figure 5.) During the entire growth the relative interocular breadth changes to a great extent; the highest index () was found in a white fetus of 11 w
. Carnegie Institution of Washington publication. DEVELOPMENT OF EXTERNAL NOSE IN WHITES AND NEGROES. 185 negroes. The racial difference in the relative interocular breadth is not con- stant during intrauterine growth. During the early part of the latter negroes show a relatively shorter distance between the eyes, but later it frequently exceeds this measurement in whites, and at birth and in postnatal life is always greater. (See curves in figure 5.) During the entire growth the relative interocular breadth changes to a great extent; the highest index () was found in a white fetus of 11 weeks, while the lowest figure () was observed in an adult white. The Japanese fetus of the eleventh week had a relative interocular breadth of ; the Filipinos had in the eleventh week, in the fourteenth week, in the nineteenth week, and in the twenty-first week; the Indians had in the sixteenth week, in the eighteenth week and in the twentieth week. Of the few monkey fetuses available for comparison, the relative interocular breadth in the younger macacus was and in the older one (unquestionably a very rare exception!); the younger gorilla had for this index , the older one The relative interocular breadth in these apes, with the § exception of the older macacus, was smaller than in correspond- ing human stages, but much greater than in the adult macacus and gorilla. Fischer (1903) showed that very young monkey fetuses have a relative interocular breadth which is even greater than the above-mentioned figures and equal that of young human fetuses. The ontogeny of monkeys shows, therefore, a condition similar to the human one—i. e., a rapid decrease in the relative dis- tance between the eyes in the begin- », ning, but one of greater degree than in man, producing a narrower inter- orbital region in adult apes than in ftionHi'—year-^ man. (In only a very few adult <<H,.,k,7«ttam».7. i ,.to. 2. adu
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