. The biology of twins (mammals). Twins. 146 THE BIOLOGY OF TWINS Set C 30 (Fig. 50). The mother has in band i a double scute two places from the right margin, and fetuses II, III, and IV have each a double scute two places from the left margin of the same band. M s 10 /:ff4 %^ 10 4;6'3 I GJZ 4 .6'^ Fig. 47. z-ez 1. 63 /•• GZ Fig. 48 ; ^ 3 is n 6:^3 4--€0 5 1; GZ. ; sP[ 4:^8 \ :€Z M— 8-^ —FT <-/2 s Z'GO FT /3 i^.-e^o i:63 M— 9 4-: 60 A: Go Fig. 49 Figs. 47, 48, and 49.—Showing the incidence of scute doubling in sets K 27, C 26, and C 76, respectively. (Details in text.) Mirror-i
. The biology of twins (mammals). Twins. 146 THE BIOLOGY OF TWINS Set C 30 (Fig. 50). The mother has in band i a double scute two places from the right margin, and fetuses II, III, and IV have each a double scute two places from the left margin of the same band. M s 10 /:ff4 %^ 10 4;6'3 I GJZ 4 .6'^ Fig. 47. z-ez 1. 63 /•• GZ Fig. 48 ; ^ 3 is n 6:^3 4--€0 5 1; GZ. ; sP[ 4:^8 \ :€Z M— 8-^ —FT <-/2 s Z'GO FT /3 i^.-e^o i:63 M— 9 4-: 60 A: Go Fig. 49 Figs. 47, 48, and 49.—Showing the incidence of scute doubling in sets K 27, C 26, and C 76, respectively. (Details in text.) Mirror-imaging among the fetuses of a set.—It is very common to find symmetry reversals within a set of quadruplets involving what we call mirror-imaging. Set C 30 (Fig. 50). Fetus I has a pecuhar type of scute three places from the right margin of band i,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Newman, Horatio Hackett, b. 1875. Chicago, Ill. , University of Chicago press
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