. Elements of zoölogy : a textbook. Zoology. OPISTHOBRANCHIATA. 417 in other gasteropods ; and others, as Jjitlla, etc. (Fig. 610), have the shell fully formed, but very thin. One great division of the Opisthubrancliiates is called Tectibranchiata, because the branchiae are covered by the shell, or mantle. These are the Toruatellidae (Tumatelltt, Itingicula, etc., Fig. 007), the Bui lid* (Bulla, etc., Fig. (ilO), the Aplysiaditi (Aplysia, etc.) the Pleurobnm- uhidffi (Plewrobranchus, etc.), and the Phyllidiadse. Other Opisthobranchiates are called Kudibranchiata, because their gills, situated
. Elements of zoölogy : a textbook. Zoology. OPISTHOBRANCHIATA. 417 in other gasteropods ; and others, as Jjitlla, etc. (Fig. 610), have the shell fully formed, but very thin. One great division of the Opisthubrancliiates is called Tectibranchiata, because the branchiae are covered by the shell, or mantle. These are the Toruatellidae (Tumatelltt, Itingicula, etc., Fig. 007), the Bui lid* (Bulla, etc., Fig. (ilO), the Aplysiaditi (Aplysia, etc.) the Pleurobnm- uhidffi (Plewrobranchus, etc.), and the Phyllidiadse. Other Opisthobranchiates are called Kudibranchiata, because their gills, situated on the back or sides of the Flu. Oil. FIG. FIG. 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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