. Outlines of zoology. Zoology. Fig. 103.—Dissection of Holothurian {Holothuria tubulosa) from the ventral surface. /., Tentacles surrounding the mouth; scattered tube-feet of ventral surface ; c., calcareous ring surrounding the food canal; a., ampullae of tentacles (modified tube-feet); r., circular vessel surrounding the gullet, giving off the branched stone canal (j/.), the single Polian vesicle (a.), and the five radial canals () which run forwards, pass through the calcareous ring, and then curve outwards to run on the surface of the longitudinal muscles () throughout the b
. Outlines of zoology. Zoology. Fig. 103.—Dissection of Holothurian {Holothuria tubulosa) from the ventral surface. /., Tentacles surrounding the mouth; scattered tube-feet of ventral surface ; c., calcareous ring surrounding the food canal; a., ampullae of tentacles (modified tube-feet); r., circular vessel surrounding the gullet, giving off the branched stone canal (j/.), the single Polian vesicle (a.), and the five radial canals () which run forwards, pass through the calcareous ring, and then curve outwards to run on the surface of the longitudinal muscles () throughout the body. Of the five longitudinal muscles, one only is marked, g1., The gut cut through at the beginning of the first loop; «z., the mesenteiy which attaches the gut to the body-wall, showing the course of the gut; e&.} the other end of the gut; cl., the cloaca bound down by muscles ; an., the anus ;, the right respiratory tree, the left is cut short close to its origin ; ov., the ovary. The blood vessels are not 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 Thomson, J. Arthur (John Arthur), 1861-1933. Edinburgh, Glasgow and London, H. Frowde and Hodder & Stoughton
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Keywords: ., bookauthorth, bookcentury1800, bookdecade1890, booksubjectzoology
