Now a diver wears a diving suit and with small pronged hook and a net down he goes to a depth of ... Outstanding features are the photographs and diagrams of the stinging cells, and the catching and digestion of the water ... That the king crab is more closely allied to spiders and scorpions than to the crab is pointed out .
|Title||:||Educational Film Catalog|
|Author||:||H.W. Wilson Company|