. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. 176 PROVINCE ANNULATA. h < ) Hi lil .:* I Order 1. Planariic.—I'ree-living. flat, one-jointed cili- ated worms, found in both salt and fresh water. Order 2. Trcmatoda or Mukes.—Parasites, one- jointed, but with suckers for attachment. Order 3. Cestoda.—Tape-worms and their allies, elongated and segmented parasitic flat worms, without mouth or alimentary canal, and with sucker or suckers and hooks for attachment. Class II. —C<KLEr,MiNTHA. In these the al
. Handbook of zoology with examples from Canadian species, recent and fossil [microform]. Zoology; Invertebrates; Zoologie; Invertébrés. 176 PROVINCE ANNULATA. h < ) Hi lil .:* I Order 1. Planariic.—I'ree-living. flat, one-jointed cili- ated worms, found in both salt and fresh water. Order 2. Trcmatoda or Mukes.—Parasites, one- jointed, but with suckers for attachment. Order 3. Cestoda.—Tape-worms and their allies, elongated and segmented parasitic flat worms, without mouth or alimentary canal, and with sucker or suckers and hooks for attachment. Class II. —C<KLEr,MiNTHA. In these the alimentary canal is sus})ended in an ab- dominal cavity, and the sexes are distinct, which is not the case in the previous group. The common round worms of the human intestines {Ascaris) belong to this order. A still more dangerous though microscopic para- site is the Trichina spiralis (Fig. 228), which inhabits the. Fig'. 228.—TiuciiiXA , in the , nia^^nified ; and specimen removed from its cyst, fartlier maynilied. muscles of the domestic hog, and when transferred from these to the human stomach, multiplies rapidly, and penetrates the tissues, causing great and sometimes fatal irritation. It finally forms a sac or cyst, in which it remains in a quiescent condition, unless transferred into the alimentary canal of some new host, where the same course is again 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 Dawson, J. W. (John William), Sir, 1820-1899. Montreal : Dawson
Size: 1585px × 1577px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjecti, booksubjectzoology
