Some Points in the Development of a Myxinoid (Bdellostoma Stouti Lockington).1896 |
Common terms and phrases
acustico-facialis adult Amphioxus arises auditory vesicle Bdellostoma Stouti bilaterally symmetrical body cavity cell thick choroidal fissure close contact coming in close connection cranial nerves cross section development diameter distal end dorsal roots duct ductus endolymphaticus embryo of stage endolymphaticus and ductus entirely disappear epibranchial ganglia extends backwards extends upwards external epiblast facial fact gill pouch group contains Herr hollow homologous Jena join the brain kidney last gill lateral root lateral walls lens lies maxillo-mandibular ganglion medulla mouth Myxine Myxinoid Myxinoiden nose and hypophysis number oldest embryo olfactory Ontogenie opening optic cup optic nerve optic stalk outer layer Petromyzon pockets posterior present recessus vestibuli region sacculus saccus endolymphaticus second and third segments semicircular canal series short distance slender nerve slender roots solid somatic mesoblast spinal ganglion subsequent disappear system begins thickening third ganglion three ganglia traces tract trigeminus tubules upper end vagus ventral vertebrate vesicle has become