. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. ANATOMICAL NOMENCLATURE. 129 not proved, and it is possible that the male sometimes applies the genital bulbs to the sexual aperture, and thus charges them with the of Sperm fertilizing fluid, a fact which Menge seems to suspect may be the case with Lycosa That this transfer is so seldom observed, and by so few persons, will not excite wonder on the part of one who has devoted much time to the study of the habits of
. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. ANATOMICAL NOMENCLATURE. 129 not proved, and it is possible that the male sometimes applies the genital bulbs to the sexual aperture, and thus charges them with the of Sperm fertilizing fluid, a fact which Menge seems to suspect may be the case with Lycosa That this transfer is so seldom observed, and by so few persons, will not excite wonder on the part of one who has devoted much time to the study of the habits of these reticent creatures, and who knows the difficulty of obtaining a complete observation of even the most common of its habits. Possibly the extrusion of the sperma by the male upon the little silken receptacle from which it is absorbed into the palps takes place very rapidly; or it may be done long before the act of fertilization ; perhaps, as Thorell suggests, immediately after the last change of the skin. The Cymbium is that part of the modified digital joint of the male spider's palpus upon which is placed the copulatory apparatus which it sustains. In many species of Orbweavcrs it covers one side of bium. the diSital> having the appearance of the half of a seed husk, or shell of Tec. sem. grain, and is covered more or less thickly with hairs and bristles. (See Fig. 98, cym.) The alveolus (alv) is the concavity in the cymbium within which is located the copulatory apparatus proper. Its form depends upon the* structure of the cymbium, with certain spiders occu- Alveolus. , [. ... pying half of the sur- F. . -â .hae JtL, Digital joint of palp of a male spider (after Wagner), face, 111 Which Case the Cym- schematic longitudinal section of the cymbium with the copu- bium has the form of n canoe latory aPParatus drawn °ut; emt>. embolus; teg, teguium; mum nab me ioim 01 a canoe. measalli meati 8anguinis, minute ducts for condUeting blood With Others
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectspiders, bookyear1889
