. Natural history. Geology; Zoology; Botany. GALVINBLLA. 27 followed by eight simple lines of three to six cerata each. The outermost cerata are small, cylindrical and straight; the inner are 5-6 mm. high, and nearly always curved almost into a semicircle. Four of the cerata stand in the middle of the back, two in front of the pericardium and two behind. Though a few of them have been lost, they are not caducous. The anus is a prominent medio-dorsal papilla, standing just behind the pericardium and after the fourth row of cerata. The jaws are thin and yellowish. They are not denticulate, but p
. Natural history. Geology; Zoology; Botany. GALVINBLLA. 27 followed by eight simple lines of three to six cerata each. The outermost cerata are small, cylindrical and straight; the inner are 5-6 mm. high, and nearly always curved almost into a semicircle. Four of the cerata stand in the middle of the back, two in front of the pericardium and two behind. Though a few of them have been lost, they are not caducous. The anus is a prominent medio-dorsal papilla, standing just behind the pericardium and after the fourth row of cerata. The jaws are thin and yellowish. They are not denticulate, but present near the edge an appearance like a tessellated pavement due to numerous short prominences. The radula consists of sixty-four rows containing three teeth each. The central tooth (fig. 29) bears a median cusp, and on each side of it four denticles, of which the fourth is less conspicuous than the others and sometimes absent. The median cusp is fairly strong, but rather low and points straight forward, whereas the first of the lateral denticles often points distinctly upwards. The side denticles are fairly long but a little irregular in shape and direction. The lateral teeth VV cu Fig. 29.—Qalmnella antarctica—CBNTEAr; Tooth; a From below; 6 Feom 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 National Antarctic Expedition, 1907-1904; Fletcher, Lazarus, Sir 1854-1921; Bell, F. J. (Francis Jeffrey), 1855-1924; British Museum (Natural History). London, Printed by order of the Trustees of the British Museum
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