. Contributions to embryology. Embryology. 182 DE\T:L0PMENT of external nose in AVIIITES AND NEGROES. an index below 24 is sure to be found only in whites. The extremes of this index, as found in fetu-ses, are and The Japanese fetus of the eleventh week had a relative nasal breadth of â i. c, below the average of wliites of the same ago. The four l^'ilipinos show the following values for tliis relative measurement: Eleventh week, ; fourteenth week, ; nineteenth week, ; twenty-first week, The three Indians: Sixteenth week, ; eighteenth week, ; twentieth
. Contributions to embryology. Embryology. 182 DE\T:L0PMENT of external nose in AVIIITES AND NEGROES. an index below 24 is sure to be found only in whites. The extremes of this index, as found in fetu-ses, are and The Japanese fetus of the eleventh week had a relative nasal breadth of â i. c, below the average of wliites of the same ago. The four l^'ilipinos show the following values for tliis relative measurement: Eleventh week, ; fourteenth week, ; nineteenth week, ; twenty-first week, The three Indians: Sixteenth week, ; eighteenth week, ; twentieth week, All the Fili- pinos, as well as Indians, show greater relative nasal breadths than the averages in whites of corresi)onding ages. Of the two macacus fetuses of Toldt, the younger had a ri'lati\-e nasal l)readth of , the older one of The gorilla fetus of Duckworth (1902), with a sitting height of 71 mm., had a relative nasal breadth of , and the one described by Deniker (1887), with a sitting height of 136 mm., had a nasal breadth of These figures of catarrhine apes are higher than those of corresponding stages of human fetuses, and are situated at the upper end of the range of variation of this measurement in man. NASAL INDEX. Table 8 (on p. 181) gives the averages and ranges of variation of the nasal index and the averages of the upper facial index. The relative ranges of variation for the nasal index of whites are as shown in table 9. The nasal index has a variability which is at least equal to that of the absolute nasal measurements. This leads to the conclusion that there can exist no close correlation between nasal height and breadth, which con- stitute the index. Broca (1872) calculated the nasal index in 21 skulls of fetuses from the fourth to the fifth month; the relative range of variation of this series was 44. The relative range of variation of the nasal index in the 25 adult negroes and the 51 adult whites, previously used for compar
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