. Text-book of zoology for junior students. Zoology. 122 IXVEKTEBUATE ANIMALS. tary canal in many Mammals, birds, and lislics. Alioiit one hundred and twenty species tif £r/niiorIii/iipe and North America. This curious W(]rm is often found in ponds and rivers, and may be two or three feet long when mature. (_)ther examples are found coiled up I'ound the intestine of ground-beetles or grasshoppers ; liut it is not clear whether these are in a natural posi- tion, so to speak, or whether they may not be wandered individuals. IIX such cases, however, the woi'm ultimately leaves its insect-host, an
. Text-book of zoology for junior students. Zoology. 122 IXVEKTEBUATE ANIMALS. tary canal in many Mammals, birds, and lislics. Alioiit one hundred and twenty species tif £r/niiorIii/iipe and North America. This curious W(]rm is often found in ponds and rivers, and may be two or three feet long when mature. (_)ther examples are found coiled up I'ound the intestine of ground-beetles or grasshoppers ; liut it is not clear whether these are in a natural posi- tion, so to speak, or whether they may not be wandered individuals. IIX such cases, however, the woi'm ultimately leaves its insect-host, and lietakes itself to water, where it lays Idiig chains of wliite eggs. The em- Ijryo is at first free and locomotive, witli tliree pail's of cephalic hooks (Hg. 77, P>), and a little protrusible sudut. It passes its next stage en- cysted in the Ia,rvie of water-insects, into whieh it has bored its way, and tlien it gains access to the bodies of fislies which eat these larva', intimately, however, it becomes free, and makes its way to Fig. 77. —OimliaccM. A, A siiiiiU ii ili\idn;Ll ol' dvrdius aqutUlcus, < tlic ii.'itural size. B, L\:u:i-A ;uili'rioiIy ("Hg. 7»), and leads tlirough .a gullet ((/) to a strong. 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 Nicholson, Henry Alleyne, 1844-1899. New York, American Book Co
Size: 1171px × 2133px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
