Publisher's Synopsis
Excerpt from A Synopsis of the Arctic and Scandinavian Recent Marine Foraminifera Hitherto Discovered
Any one who for some length of time has been engaged in the study of this class, is familiar with the common occurrence of even great diversity between individuals appa rently issued from the same stock. Whenever this is the case we should not be too prone to dissociate such forms under different denominations, the more so as it may be expected that the employed 'characters are not available for a satisfactory limitation of more validity than what concerns local and individual minor discrepances. Thus, in syste matizing this class, it is not at all needed to rank varieties as species as has been insisted upon by brady. Although it would be consistent with nature to speak of variety of variety we are not compelled to carry out such a scheme, when we coordi nate all varieties under their type species. It is neither easier nor more difiicult to cha racterise distinct species amongst an assemblage of forms of this class than is the case within other classes of organisms, particularly when we have to 'deal with allied forms extending over several geological horizons or areas of the sea. Intermediate forms and varieties are met with at every instance, and this course of things will always bring about a more or less deficient limitation of species and genus, but by giving the notion of species its due compass, and expanding the sphaeres of genera, always selecting the more constant differential features, we may overcome a good deal embarassing incon sistences in the system, the chief purpose of which should be to unfold the affinity and origin of the forms.
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