. Journal of Agricultural Research. Journal of Agricultural Research Washington, D. C >> <6 PLATE 4 Platygasier hiemalis A.—One germ of a twin that has become disjoined from the other. It is surroundedby host tissue and its embryonic region contains four nuclei. One paranuclear massis shown in the trophamnion. X 1,100. B.—Embryo in the early blastula stage containing 16 embryonic nuclei, of which 7are shown. X i, 100. C.—Monembrjonically developing egg in 3 2-cell blastula stage with two paranuclearmasses in the trophamnion. Host tissue omitted. X 1,100. D.—Blastula stage of embryo. N

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. Journal of Agricultural Research. Journal of Agricultural Research Washington, D. C >> <6 PLATE 4 Platygasier hiemalis A.—One germ of a twin that has become disjoined from the other. It is surroundedby host tissue and its embryonic region contains four nuclei. One paranuclear massis shown in the trophamnion. X 1,100. B.—Embryo in the early blastula stage containing 16 embryonic nuclei, of which 7are shown. X i, 100. C.—Monembrjonically developing egg in 3 2-cell blastula stage with two paranuclearmasses in the trophamnion. Host tissue omitted. X 1,100. D.—Blastula stage of embryo. Note the breaking up of the paranucleus into smallermasses. X550. E.—Embryo at the time of formation of germ layers. X550. F.—En toto drawing of U-shaped embryo within its trophamnion. One large par-anuclear mass is located above it. X108. G.—Outline drawing of a parasite larva with paranucleus. The trophamnion hasbecome reduced to a thin membrane. X60. 54486—23 2 PLATE 5Platygasier hiemalis A.—Photomicrograph of t

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