1. The malacia breed in the spring, and first of all the marine sepia, though this one breeds at all seasons. It produces its ova in fifteen days. When the ova are extruded, the male follows, and ejects his ink upon them, when they become hard. They go about in pairs. The male is more variegated than the female, and blacker on the back. The sexes of the polypus unite in the winter, the young are produced in the spring, when these creatures conceal themselves for two months. It produces an ovum like long hair, similar to the fruit of the white poplar. The fecundity of this animal is very great, for a great number of young are produced from its ova. The male differs from the female in having a longer head, and the part of the tentaculum which the fishermen call the penis is white. It incubates upon the ova it produces, so that it becomes out of condition, and is not sought after at this season. 2. The purpuræ produce their ova in the spring, the ceryx at the end of the winter; and, on the whole, the testacea appear to contain ova in the spring and autumn, except the eatable echini. These principally produce their young at the same seasons, but they always contain some ova, and especially at the full and new moon, and in fine weather, but those which live in the Euripus of the Pyrrhæi are better in winter. They are a small kind but full of ova. All the cochleæ appear to contain ova at the same season. CHAPTER XI. 1. The undomesticated birds, as it was observed, generally pair and breed once a-year. The swallows and cottyphus breed twice, but the first brood of the cottyphus is killed by the cold, for it is the earliest breeder of all birds. It is able, however, to bring up the other brood. But the domestic birds, and those capable of domestication, breed frequently, as pigeons during the whole summer, and domestic fowls. For these birds have sexual intercourse, and produce eggs all the year round, except at the winter solstice. 2. There are many kinds of pigeons, for the peleias and peristera are different. The peleias is the smaller, but the peristera is more readily tamed. The peleias is black and small, and has red and rough feet, for which reason it is never domesticated. The phatta is the largest of the tribe, the next is the œnas, which is a little larger than the peristera, the trygon is the least of all. If the peristera is supplied with a warm place and appropriate food, it will breed and bring up its young at any season of the year. If it is not properly supplied, it will only breed in the summer. Its young ones are best during the spring and autumn, those produced in the hot weather in summer are the worst. CHAPTER XII.