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Lychnocanoma babylonis (Clark and Campbell, 1942)

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Shell smooth, generally pyramidal, with long, stout, conical, apicl, horn, surface minutely and irregularly pitted, about four times its basal diameter in length and 0.7 length of a foot; cephalis truncate-conical, its sides slightly and asymmetrically swollen, its cavity strongly globose, its aperture wide, the walls distally thick, thinner proximally, the surface of the same texture as the horn from which it is scarcely outwarded differentiated; thorax strongly truncate-conical, as a whole markedly triangular, with three, vertical, equal, equidistant angles which arise obscurely just belw the cephalis and increase in development as they progress toward the peristome, theses angles forming the bases from which the feet arise at the wides level of the thorax, the thorax contracted below the long, distal (0.67 length of the thorax as a whole), conical region as an inverted truncated, low cone whose base forms the widest part of the body, and the apical part forms the aperture of the shell, the surface of th thorax with regular rows of fairly large, circular pores, with concave sides, the base of the pore sunken well below the outer surface of the relatively thick wall, the pores numbering about a dozen in a vertical row; feet three, formed from the three angles of the thorax, the feet conical, strong, much curved inwardly, their bases with several longitudinal fins or thickened ridges which are decurrent, the remainder of the foot of the same texture as the horn and cephalis, circular in cross section; aperture of the shell circular, simple, its margin thick. Length of the horn, 60.6; of cephalis, 29.8; of thorax, 104.6; of legs, 84.8; diameter of the pores, 6.6; breadth of base of horn, 23.2; of base of cephalis, 34.2; of thorax between legs, 73.8; of aperture, 36.4; of widest part of the thorax, 91.4.
(Clark and Campbell) 1942











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