A history of British star-fishes, and other animals of the class Echinodermata . tapers to a point. The pro-boscis (which is retracted in the figure, drawn from aspecimen in spirits) is about one-third the length of thebody, and is provided towards its extremity with a circleof tentacular filaments, flattened, lanceolate, and jagged, ordigitate at the edges. The vent opens near its back. Onopening the creature we find no dental processes, but adigestive apparatus, consisting of a narrow oesophagus,which opens into an intestine twisting spirally on itself tothe posterior extremity of the body,
A history of British star-fishes, and other animals of the class Echinodermata . tapers to a point. The pro-boscis (which is retracted in the figure, drawn from aspecimen in spirits) is about one-third the length of thebody, and is provided towards its extremity with a circleof tentacular filaments, flattened, lanceolate, and jagged, ordigitate at the edges. The vent opens near its back. Onopening the creature we find no dental processes, but adigestive apparatus, consisting of a narrow oesophagus,which opens into an intestine twisting spirally on itself tothe posterior extremity of the body, and then returning ina similar manner along the same spiral to the vent, on eachside of which is a short brown muscular tube, probablyrespiratory. The vascular system is complicated, and thenervous consists of a strong nervous cord, which runsalong the abdominal surface of the animal terminatingposteriorly in numerous filaments, and anteriorly by twodelicate threads which surround the oesophagus where itjoins the base of the proboscis. The vignette is a view from Leith harveys syrinx. 249 SIPUNCULACEJE.
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Keywords: ., bo, bookcentury1800, bookdecade1840, bookidhistoryofbritish00forb
