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HENRIETTE HERLANT-MEEWIS
Fio. 2. Aeoloeoma viride. Sagittal section through the pygidial region 9 h after
transection. Blastocytes (B) in the ectoderm and endoderm. D, Dorsal side; NC, nerve
cord enclosed in the ectoderm; V, ventral side. (Herlant-Meewis, 1953.)
FIG. 3. Aeolosoma viride. Pygidial region 52 h after transection. Frontal section
through the latero-ventral wall. Blastocytes (B) in the ectoderm and parietopleural cell
multiplication (P). (Herlant-Meewis, 1953.)