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"We have," he cried, "an indomitable and unfaltering captain," and cheer on cheer rose, while the Old Man sat, white, silent, with a composed though rapt look. There was the bathos of a poor speech from Colonel Nolan, and then the division. Everybody has the numbers now 34 majority 34 in spite of Saunders and Bolton, of absent Wallace, and unpaired Mr. Wilson.
The term balanced crosses then conveys the idea of complete bisexuality, all unit-characters combining in pairs. Unbalanced crosses are those in which one or more units do not find their mates and therefore remain unpaired. This distinction was proposed by Macfarlane when studying the minute structure of plant-hybrids in comparison with that of their parents .
Hence there can be little doubt that the unpaired units are the cause of this decrease in reproductive power. The genus Oenothera is to a large degree devoid of varietal characteristics, especially in the subgenus Onagra, to which biennis, muricata, lamarckiana and some others belong.
Now it seems to me that the secondary flagellum can by no means furnish a reason for doubting the close relationship of M. Fresnelii to M. exilii, etc., which is indicated by the peculiar structure of the unpaired clasp-forceps.
The comprehensive and careful investigations of Claus have filled up this deficiency in our knowledge, and rendered the section of the Copepoda one of the best known in the whole class. The following statements are derived from the works of this able naturalist. The unpaired eye, labrum, and mouth, already occupy their permanent positions.
This is a possible explanation and requires consideration. It cannot account for all the diverse ways in which the sexes are mixed up in the fighting it cannot, for instance, explain the fact that an unpaired male will attack either sex of an adjoining pair indiscriminately but nevertheless it appears at first sight to be a reasonable explanation of some of them.
As the males of several species of Melita are distinguished by the powerful unpaired clasp-forceps, the females of some other species of the same genus are equally distinguished from all other Amphipoda by the circumstance that in them a peculiar apparatus is developed which facilitates their being held by the male.
If we compare the new form in this case with the type from which it has originated, it may be seen that the new character does not find its mate, or its opposite, and it will be unpaired in the hybrid. In the case of retrogressive changes the visible modification is due, at least in the best known instances, to the reduction of an active quality to a state of inactivity or latency.
Embryo of a Squilla, magnified 45 diam. a. heart. The corresponding body-segments are already well developed, an unpaired eye is still present, the anterior antennae are already biramose, whilst the flagellum is wanting in the posterior, and the mandibles are destitute of palpi; the four anterior abdominal segments bear biramose natatory feet, without branchiae; the fifth abdominal segment has no appendages, and this is also the case with the tail, which still appears as a simple lamina, fringed on the hinder margin with numerous short teeth.
Choice exerted by the female Length of courtship Unpaired birds Mental qualities and taste for the beautiful Preference or antipathy shewn by the female for particular males Variability of birds Variations sometimes abrupt Laws of variation Formation of ocelli Gradations of character Case of Peacock, Argus pheasant, and Urosticte.
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