Origin of Yolk in the Eggs of Spiders

Abstract

IN a remarkable paper on the oocyte of Pholcus phalangiodes published in the last century (Arch. de Biol., tome 15, 1898), Van Bambeke described a juxta-nuclear ring, the pallial layer or the pallial substance (see Wilson's “The Cell”, third edition, p. 340), which with the growth of the oocyte separates from the nucleus, and, after fragmenting finely throughout the cytoplasm directly, gives rise to fatty deutoplasm. He also described ordinary yolk spheres which are albuminous in nature and arise independently in the cytoplasm.