. Elements of zoölogy : a textbook. Zoology. DORSIBRANCHIATA. 375 12. NEMATOIDEA or Thread-worms; with a thread-like form; no segments ; dense covering; straight alimentary canal; as Hair-worms, etc. 13. KOTIFERA, minute forms with wheel-like appendages around the head. Referred to the Crustacea by some naturalists. ANXULOIDA. J II. THE ORDER OF DORSIBRANCHIATA OR LOB-WORMS, ETC. THE worms of this group belong to the sea. Some species swim freely about, and others live in the sand or mud. They get their name from the fact that, in general they have the gills in the form of short b
. Elements of zoölogy : a textbook. Zoology. DORSIBRANCHIATA. 375 12. NEMATOIDEA or Thread-worms; with a thread-like form; no segments ; dense covering; straight alimentary canal; as Hair-worms, etc. 13. KOTIFERA, minute forms with wheel-like appendages around the head. Referred to the Crustacea by some naturalists. ANXULOIDA. J II. THE ORDER OF DORSIBRANCHIATA OR LOB-WORMS, ETC. THE worms of this group belong to the sea. Some species swim freely about, and others live in the sand or mud. They get their name from the fact that, in general they have the gills in the form of short branchial append- ages along the back or body (Figs. 508-9), from the Latin dor sum, the back, and Iragchia, gills. They are known under the names of Sea-Centipedes or JSTereidae (Fig. 508); Eunicidse—a West Indian species of which (Eunice gi- gantea) attains the length of four feet; •" Sea Mice" or Aphroditidse, which are more or less covered with silky hairs of a brilliant metallic luster; and the Lob-worms or Arenicolidaj, etc. Here also may be mentioned a re- markable genus called Cirmtulus a new species of which FIG. Sea-Centipede, tfereit,. 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 Tenney, Sanborn, 1827-1877. New York : Scribner
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