title: Fine structure of the aster-associated particles in eggs of the sea urchin Hemicentrotus pulcherrimus.
mesh_terms: D000818:Animals; D005260:Female; D008854:Microscopy, Electron; D010063:Ovum / Q000166:cytology*; D010784:Photomicrography; D012617:Sea Urchins / Q000166:cytology*