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middens of Denmark, the lake dwellings of Switzerland, and the stockaded islands, or "crannogs," of the British Isles, belong to this era. Lubbock.

A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.

Any one of a series of cyanogen compounds; particularly, one of those cyanides of alcohol radicals which, by boiling with acids or alkalies, produce a carboxyl acid, with the elimination of the nitrogen as ammonia.

dual organism, -- in distinction from phylogeny, or evolution of the tribe. Called also henogenesis, henogeny.

A white crystalline nitrogenous substance, obtained indirectly by the action of cyanogen on aniline, and regarded as an anilide of oxamic acid; -- called also phenyl oxamide.

heredity are reproduced in development; original simple descent; -- distinguished from kenogenesis. Sometimes, in zoölogy, the abrupt metamorphosis of insects, crustaceans, etc.

Same as Pycnogonida.

The region which is included within the outlet of the pelvis, and is traversed by the urinogenital canal and the rectum.

A combining form from Gr. sound, tone; as, phonograph, phonology.

dy, separated by some physiologists from blood plasma. It is probably identical with fibrinogen.

r the Lima bean. -- Pole flounder (Zoöl.), a large deep-water flounder (Glyptocephalus cynoglossus), native of the northern coasts of Europe and America, and much esteemed as a food fish; -- called also craig flounder, and pole fluke. -- Pole lathe, a simple form of lathe, or a substitute for a lathe, in which the wo…

volving, polygamy; having a plurality of wives; as, polygamous marriages; -- opposed to monogamous.

han one woman, or the practice of having several wives, at the same time; -- opposed to monogamy; as, the nations of the East practiced polygamy. See the Note under Bigamy, and cf. Polyandry.

ells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis.

Polygenetic mountain range (Geol.), one which is composite, or consists of two or more monogenetic ranges, each having had its own history of development. Dana.

animals of the same species have sprung from more than one original pair; -- opposed to monogenist.

See Persinogen.

being beyond the point-blank range). Fair Venusson that with thy cruel dart At that good knoght cunningly didst rove. Spenser.

s. The color is generally white or pale. Called also ladder shell, and wentletrap. See Ptenoglossa, and Wentletrap.

A European flounder (Arnoglosus laterna, or Psetta arnoglossa); -- called also megrin, and smooth sole.