. Animal parasites and messmates. Parasites. 206 ANIMAL PARASITES AND MESSMATES. We have found in bats two taeniae, both incompletely developed, and occupying the digestive tube. One has a rostellum without hooks, like the taeniae of the vegetable- feeders, the other has hooks like those of the carnivdra. These cestode parasites are observed to be of two prin- cipal forms ; the first vesicular, like the finger of a glove partly drawn inwards. They are always lodged in the midst of the flesh, or in a closed organ in the middle of a cyst; under this form the cestode worm is harboured by a host w
. Animal parasites and messmates. Parasites. 206 ANIMAL PARASITES AND MESSMATES. We have found in bats two taeniae, both incompletely developed, and occupying the digestive tube. One has a rostellum without hooks, like the taeniae of the vegetable- feeders, the other has hooks like those of the carnivdra. These cestode parasites are observed to be of two prin- cipal forms ; the first vesicular, like the finger of a glove partly drawn inwards. They are always lodged in the midst of the flesh, or in a closed organ in the middle of a cyst; under this form the cestode worm is harboured by a host which is to serve as a vehicle to introduce him into his final host. He is a parasite on a journey; he is always agamous, and usually bears the name of cysti- cercus (Fig. 49). As to the second form, it is like a ? ? ribbon; it attains a great length, always occupies the intestine, attains its com- plete and sexual develop- ment, and lays an innumer- able quantity of eggs which are disseminated with the evacuations. The rabbit harbours a cysticercua which has its final destination in the dog (a xenosite); but indepen- dently of this stranger, it ; a, upper part, of giveS hospitality to a SpCcial is about to separate; c, neck of the taenia in itS intCStineS. iniS worm; d, the head, showing the • •- w^^vm +1ta T^iiin suckers and the crown of hooks. IS ItS OWU WOrm, Xlie 1 WUia pectinata, which is a nos- tosite. All the herbivora are in a similar case; the ox and the sheep possess a peculiar taenia of their own,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beneden, M. van (Pierre Joseph), 1809-1894. New York, D. Appleton and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectparasit, bookyear1876
