BLASTODERM

(Yunanca köken — orijinale bakınız.) In Anatomy, the germinal skin or membrane, or that granular membrane or stratum which lies immediately beneath the membrana vitelli of the ovum, and which is the seat of development of all parts of the body of birds. BLA^STUS. {'BXa.rToc.ytt, I germinate.) A name sometimes given to the plumula and radicle of gra es. BLATTA. a genus of nocturn a i Orthopterous insects, commonly called cock-roaches, or black beetles. In modern Entomology, it forms the type of a family, including many genera. [s. 163]