As it is a staple food with the poorer classes, the deficiency is made up through importation.
This deficiency is made up by the addition of auxiliaries or suffixes.
There is, however, a yearly deficiency of more than £6000.
Beri-beri is a dietetic deficiency disease which manifests itself by cardiac weakness with shortness of breath, swelling of the legs and peripheral neuritis with numbness of the limbs and weakness.
This deficiency is very usual in the class; at the same time, many Lamellibranchs have tentacles on the edge of the mantle supplied by a pair of large well-developed nerves, which are given off from the cerebro-pleural ganglion-pair, A, When free swimming, shows the two dentigerous valves widely open.