Contributions from the Biological Laboratories in Princeton University, Volume 4

adult alkalies Anat animals anlagen aorta appearance apyrene spermatozoa axial fibers axis become blastomeres bundle of axial caudal cell division centrifuged centrioles centrosome channels chromatin chromosomes cisterna chyli color change Crepidula plana cytolysis cytoplasm degeneration diameter differentiation dorsal electroplax embryo endothelium eupyrene figure formation germinal vesicle granules growth Gymnarchus increase injected Kernplasma-Relation larger larvae later left renal longitudinal LUMBAR lymphatic spaces lymphatic system LYMPHATIC TRUNKS macromeres membrane mesenchyme muscle cells myofibrils myotome NaOH nerve neutral red NH4OH normal nuclear size nucleus number of cells oligopyrene organs Paludina permeability Phallusia pig embryo plasma plate plexus polar body pole position postcardinal postcava posterior precardinal Professor Sabin protoplasm region second cleavage segments series 23a shown side species specimens spermatoblasts spermatozoa spindle stage stained Strombus structure substance supracardinal surface thoracic duct tion Transverse section vacuoles veno-lymphatics venous ventral vesicle vessels yolk