. The Encyclopædia britannica; a dictionary of arts, sciences, literature and general information. -. the archenteron. which opens to the exterior by theorifice of invagination or blastopore. One important fact shouldgj^ Bn cc ips an n. ic rm cb ^Ps m gl

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910