. Parasites and parasitosis of the domestic animals : the zoo?logy and control of the animal parasites and the pathogenesis and treatment of parasitic diseases . Domestic animals. 190 PARASITES OF THE DOMESTIC ANIMALS 2. Hymenolepis carioca.—The head is piriform with retractile rostellum. It is unarmed. The segments number about 500, all much wider than long; terminal segments measure mm. The genital pores are imilateral. The worm is very fragile and delicate. Length, 3-8 cm. (lM-3 1/8 inches). The life history is unknown. 3. Davainea tetragona (Twnia tetragona).—The head (Fig. 104) is
. Parasites and parasitosis of the domestic animals : the zoo?logy and control of the animal parasites and the pathogenesis and treatment of parasitic diseases . Domestic animals. 190 PARASITES OF THE DOMESTIC ANIMALS 2. Hymenolepis carioca.—The head is piriform with retractile rostellum. It is unarmed. The segments number about 500, all much wider than long; terminal segments measure mm. The genital pores are imilateral. The worm is very fragile and delicate. Length, 3-8 cm. (lM-3 1/8 inches). The life history is unknown. 3. Davainea tetragona (Twnia tetragona).—The head (Fig. 104) is small and tetragonal; rostellimi armed with a crown of 100 hooks. The suckers are oval and armed with 8-10 circlets of small booklets. The short neck is followed by short trapezoid segments, those terminal. Fig. 103.—Choano- taenia infundibulifor- mis, scolex much con- traoted, —• enlarged (after Guberlet, in '' Transactions of the American Microscopi- cal Society").. 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 Underhill, Benjamin Mott. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdomesti, bookyear1920
