Text-book of comparative anatomy . jiht FIG. 1.—Representation of thepharyngeal apparatus of an Anne-lid, second diagram, g, Brain; jih,pharynx; rt, retractors; ?n/i., burculcavity; vd, oesophagus. A, In a,withdrawn condition. B, In a pro-truded condition. FIG. 134.—Third diagram of thepharyngeal apparatus of an Annelid(Eunicide), withdrawn. g, Brain ;Id, cesophagus; ph, pharynx; pltt,pharyngeal sac; k, jaws; mh, buccalcavity; m, mouth ; r, dorsal, 6, vent-ral side. Among the so-called ArcMannclida, Histriodrilus approaches nearest to the thirdtype on account of its ventral pharyngeal bulb arm
Text-book of comparative anatomy . jiht FIG. 1.—Representation of thepharyngeal apparatus of an Anne-lid, second diagram, g, Brain; jih,pharynx; rt, retractors; ?n/i., burculcavity; vd, oesophagus. A, In a,withdrawn condition. B, In a pro-truded condition. FIG. 134.—Third diagram of thepharyngeal apparatus of an Annelid(Eunicide), withdrawn. g, Brain ;Id, cesophagus; ph, pharynx; pltt,pharyngeal sac; k, jaws; mh, buccalcavity; m, mouth ; r, dorsal, 6, vent-ral side. Among the so-called ArcMannclida, Histriodrilus approaches nearest to the thirdtype on account of its ventral pharyngeal bulb armed with jaws. The pharynx(cesophagus) of Polygordius is distinguished by the want of a muscular layer, and bythe great thickening of its epithelial wall, which is very thin only in the ventralmiddle line. Under the pharynx there lies a thin-walled channel, closing blindlyand communicating by a longitudinal slit with the pharynx. In Protodrilus amuscular accessory organ, bent in the shape of a U, and lying under the beginning o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
