Elementary text-book of zoology, general Elementary text-book of zoology, general part and special part: protozoa to insecta elementarytextbo00clau Year: 1892 BILATERAL STIIMETIIY. divides the antimeres from each other. The first, in Avhich the greater number of organs are repeated, may be designated the transverse jyldne, while the second, corresponding to the median plane of bilateral animals, is known as the sagittal2)lane (fig. \ih). Fig. 14a.—Acalepha larva (Epliyra). Rlc, marginal body ; Gf, pastric fila- ment. Re, radial-canal; O, nioutli.

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