British medical journal . 30 of these annelids intwo large tanks,considerable. The Frcuehfollows: 1. Les filets ou x>etites Sangsnes. qui out do un ;i cinq an s; 2. Les pctitcs moyennes, qui ont de cinq ii huit ans; 3. Les grosses moyennes, qui ont de huit A douze ans; 4. Les meres SangsHCS ou les grosses, qui sont tout a fait adultes; 5. I-es Sangsues vaclies. dont la laille est enomie. ihey also recognized many colour-varieties, of which wcneed only mention the speckled. (?rGcrman-lecch •rise medicinalis, with a greenish-yellow ventral surfacespotted with black, and the green Hun
British medical journal . 30 of these annelids intwo large tanks,considerable. The Frcuehfollows: 1. Les filets ou x>etites Sangsnes. qui out do un ;i cinq an s; 2. Les pctitcs moyennes, qui ont de cinq ii huit ans; 3. Les grosses moyennes, qui ont de huit A douze ans; 4. Les meres SangsHCS ou les grosses, qui sont tout a fait adultes; 5. I-es Sangsues vaclies. dont la laille est enomie. ihey also recognized many colour-varieties, of which wcneed only mention the speckled. (?rGcrman-lecch •rise medicinalis, with a greenish-yellow ventral surfacespotted with black, and the green Hungarian leech witholivo-green spotted ventral surface. Both are merelycolour-varieties of Hirudo medicinalix, which shows greatvariation in colour, and often forms colour races whenbred artificially. The varying sizes of the five categories mentioned abovernay be seen by the fact that one thousaucl of • les filets weigh from 325 to 500 grams, one thonsand of lespetites moyennes?weigh 500 to 700, one thousand of the. Fi^. 3.—Heatl of a leech, opened ventrally to three teeth and the pharynx ?»,^vith its muscles; s, a nephridium. the edge of the pool dangliug The traific, as we have seen, was verymerchants* recognized five classes as grosses moyennes wei^h 700 to 1,300 grams, and onethousand of the grosses^ 1,300 to 2,500 or even to 3,000grams. Whereas one thousand of -les vaches weigh upto 10 kilograms, and sometimes even more. To increasetheir weight the dishonest dealer sometimes gives thema heavy meal just before selling them. They are trans-ported from place to place in casks, half filled with clayand water, or in stone vases full of water. Sometim&sthey travelled iu sacks of strong linen, or even ofleather, and these have to be watered from time totime. One of the modes of moving them was to place them inbaskets full of moss or grass soaked in water, but carehad to be taken lest they escape. These baskets couldnot be packed one on another,
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmedicine, bookyear185
