A histochemical study of oogenesis in the sea urchin, Strongylocentrotus purpuratus.
D000818:Animals; D004447:Echinodermata / Q000196:embryology*; D005260:Female; D006651:Histocytochemistry; D008540:Meiosis; D008853:Microscopy; D010053:Ovary / Q000254:growth & development; D010063:Ovum / Q000166:cytology*; D012621:Seasons; D013696:Temperature