Spi"al cr"d, termination in bird-embryo, [51]
Spondylus, retina of, [114]
Squilla, eyes, [100]
Sqi"lla, glands, [422]
Stomach, cephalic, [4], [43], [102], [244]
Stylonurus Lagani, [27], [235], [239], [249]
Substantia gelatinosa Rolandi, [44]
Suprarenal body, [423]
Surfaces, dorsal and ventral, [11]
Surf"ces, reversal of, [15], [29], [36], [87], [175], [352], [433], [484]