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We would not to-day call it love, yet it foreshadowed love as the food-absorbing pore foreshadowed the mouth. As long and tedious as has been the development of this rudimentary love to the highly evolved love of to-day, just so long and tedious would be my sketch of that development. However, the factors may be hinted.
Among some of these most highly modified crustaceans the whole of the alimentary canal that is, all the food-digesting and food-absorbing parts form a useless solid cord: the animal is nourished it is a parasite by absorption of the nutritive fluid in which it swims.
Through the pores of this skin food is absorbed, and in these food-absorbing pores is foreshadowed the mouth. Division of labour has set in, and groups of cells specialise in the performance of functions. Thus, a cell group forms the skinny covering of the cluster, another cell group the mouth.
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