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On the other hand, Lane-Claypon and Starling state that in rabbits the corpora lutea diminish after the first half of pregnancy, while the growth of the milk glands is many times greater during the second half than during the first half of the period, and during the second half the ovaries may be removed entirely without interfering with the course of pregnancy or the normal development of the milk glands.
Shining in the sun amidst the flowering heather or glowing in majestic purple grandeur in the shade of shrubs stood many a foxglove, and almost as frequently seen was its relative digitalis lutea, whose flowers are much smaller and of a pale yellow.
It is difficult to reconcile entirely the evidence described by O'Donoghue from Dasyurus, with that obtained from higher Mammals, although on the whole there is reason to conclude that the corpora lutea have an important influence on the development of the milk glands.
This is not a robin, nor does it seem to be nearly related to the familiar redbreast; Pekin- or China-robin is merely the name the dealers give it, because a great many specimens are imported from China. Its classical name is Liothrix lutea. Oates calls it the red-billed liothrix. It is a bird about the size of a sparrow.
Manna is a mild agreeable laxative, and may be given with saftey to children and pregnant women: nevertheless, in some particular constitutions it acts very unkindly, producing flatulencies and distension of the viscera. Lewis's Mat. Med. GENTIANA lutea. YELLOW GENTIAN. Root.
The case of Dasyurus, however, seems inconsistent with this argument, for, as previously mentioned, Sandes found that in this Marsupial the corpora lutea persisted during the greater part of the period of lactation, which continues for four months after parturition.
Somewhat similar processes take place in the ovaries of Teleostean fishes, as I know from my own observations, but no corpora lutea are formed in these, although the degenerating follicles in course of absorption correspond to corpora lutea. Journ. Mic. It then remains without much change till parturition, after which it shrinks and is absorbed.
In nearly every instance, where true varieties and not elementary species are concerned, a single term expresses the whole character. Such a list would also serve to illustrate the second point since the same names would recur frequently. Long lists of varieties are called alba, or inermis, or canescens or lutea, and many genera contain the same appellations.
"Aurora in roseis fulgebat lutea bigis, Cum venti posuere . . . . . . variae circumque supraque Assuetae ripis volucres, et fluminis alveo, AEthera mulcebant cantu."
The former concludes from certain experiments that a given organ of internal secretion has a certain function. The corpora lutea, for example, according to one theory are ductless glands, the function of whose secretion is to establish ova in the uterus and promote their development. Another function suggested for the secretion of the corpora lutea is to prevent further ovulation during pregnancy.
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