. A manual of zoology. Zoology. Fig. 333. i-io. 334. Fig. 333.—Pyrula tuba, male (after Souleyet). The mantle has been cut on the right side and turned to the left, reversing the paUial organs a, anus; c, ctenidium; cm, columellar muscle; /, foot; h, heart in pericardium; /, intestine; /, liver; m. mantle; m/, floor of mantle cavity; ii, nephridium; ns, opening of nephridium; o, osphradium; p, proboscis; pe, penis; t, testes; v, vas deferens cut in two. Fig. 334.—Pharyngeal region of Helix pomatia. A, side view; B, section, m, muscle; oe, cesophagus; r, radula; rs, radula sac; sp, salivary duc
. A manual of zoology. Zoology. Fig. 333. i-io. 334. Fig. 333.—Pyrula tuba, male (after Souleyet). The mantle has been cut on the right side and turned to the left, reversing the paUial organs a, anus; c, ctenidium; cm, columellar muscle; /, foot; h, heart in pericardium; /, intestine; /, liver; m. mantle; m/, floor of mantle cavity; ii, nephridium; ns, opening of nephridium; o, osphradium; p, proboscis; pe, penis; t, testes; v, vas deferens cut in two. Fig. 334.—Pharyngeal region of Helix pomatia. A, side view; B, section, m, muscle; oe, cesophagus; r, radula; rs, radula sac; sp, salivary duct, 2, Ungual cartilage. being usually on the right side in front, in or beside the mantle chamber (figs. 337, 338, 339). Rarely it empties in the middle line behind. CEsophagus, stomach, and intestine are slightly marked ofi' from each other. The convolutions of the intestine are enveloped by the liver, which forms the chief part of the visceral sac. A pair of salivary glands empty into the pharynx, these in the Doliida: secreting a saliva containing 5 per cent, of free sulphuric acid. The nervous system usually differs from that of other molluscs in. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
