The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . SPIDERS SK cosmopolitan in distribution; are found inGreenland, and swarm in the tropics. Theyshow great and striking differences in form andin general habits. The spinning habit also differswidely; as one may see, by comparing the roundweb of a garden-spider, with the snare of the. Outlines of mandibles to show location of poison sac(gl. V.) and the duct (d. cr.) leading to the opening inthe falx, cr. speckled tubeweaver (Agalcna nirvia), ma
The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . SPIDERS SK cosmopolitan in distribution; are found inGreenland, and swarm in the tropics. Theyshow great and striking differences in form andin general habits. The spinning habit also differswidely; as one may see, by comparing the roundweb of a garden-spider, with the snare of the. Outlines of mandibles to show location of poison sac(gl. V.) and the duct (d. cr.) leading to the opening inthe falx, cr. speckled tubeweaver (Agalcna nirvia), madein hedges, fence-rows, roadsides and angles ofoutbuildings. These typical differences in habitarc commonly united with variations in struc-ture, and therefore have been made the basis ofscientific classification by the eminent Swedisharachnologist, Dr. T. Thorell, following sub-stantially M. Latraille. In no classification canthese functional variations be disregarded; butfor the use of the general public such an ar-rangement is most satisfactory, and is hereadopted. Spiders may be roughly divided intotwo great groups: (i) sedentary; (2) wander-ing. Sedentary spiders live on or in wovenhabitations, and take their prey by means ofsnares upon or near which they habitually thus have the distinction, almost uniqueamong lower animals, of resembling man in pro-curing a livelihood by use of manufactured im-plements. The
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