. Fourteen weeks in zoology. Zoology. CLASS VERMES: ORDER ANKULATA. 237 animal is withdrawn into the tube. Other worms nearly allied to Serpula form a tube by cementing together grains of sand and bits of broken shells. The LumbricidsB (Common Earth or Angle-worms) are wanting in gills, but minute apertures on the sides com- municate with internal respiratory sacs, on the walls of Which the blood circulates for aeration. Tiny spines directed backward enable the worm to force its way through the Mg. U) Please note that these images are extracted from scanned page images that may have
. Fourteen weeks in zoology. Zoology. CLASS VERMES: ORDER ANKULATA. 237 animal is withdrawn into the tube. Other worms nearly allied to Serpula form a tube by cementing together grains of sand and bits of broken shells. The LumbricidsB (Common Earth or Angle-worms) are wanting in gills, but minute apertures on the sides com- municate with internal respiratory sacs, on the walls of Which the blood circulates for aeration. Tiny spines directed backward enable the worm to force its way through the Mg. U) 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
