. Mollusca ... Mollusks. 64 HBLIOIDJS. form an oblique line parallel with the peristome, the first one being nearest the aperture, whereas in O. erronea ajxA 0. fri/ce they form a semi-circle, the second fold being nearest the aperture. The shell of C. odoniophora is more regularly and less coarsely ribbed than that of O. erronea, and is larger, although composed of only from 4 to 4| whorls, while the other two species possess 5 whorls. It further differs from C. erronea in that the last whorl is more deflected in front, more tumid, and then suddenly con- tracted behind the peristome, more res
. Mollusca ... Mollusks. 64 HBLIOIDJS. form an oblique line parallel with the peristome, the first one being nearest the aperture, whereas in O. erronea ajxA 0. fri/ce they form a semi-circle, the second fold being nearest the aperture. The shell of C. odoniophora is more regularly and less coarsely ribbed than that of O. erronea, and is larger, although composed of only from 4 to 4| whorls, while the other two species possess 5 whorls. It further differs from C. erronea in that the last whorl is more deflected in front, more tumid, and then suddenly con- tracted behind the peristome, more resembling G. fryce in these respects, as also in the presence of a quadrate tooth on the basal margin of the peristome. This specimen, moreover, although adult, exhibits the immature form of palatal folds (see fig. 18 a) immediately behind the callus of the mouth ; the folds themselves, however, have already been absorbed. 73. Gorilla fryae, Qude. Corilla fry<B, Gude, Science Gossip, n. s. iii, 1896, p. 89, figs. 2, 4, 5, 6. Original description:—" Testa late umbilicata, ovato-rotundata, discoidea, solidula, rufo-castanea, planulata, oblique costulata, subtus valde concava, striata, pernitida; spira plana, sutura vix impressa. Anfr. 5, vix convexiusculi, inter suturara et peri- pheriam valde angulati, ultimus subtus ornatur striis spiralibus qusB secundum latus lineis vel rugis impressis obliquis decussantur ; antice convexior, valde dilatatus, profunde descendens. Apertura obliqua, obtuse subcoi'data, lamellis 3 parietales (media elongata, validaque, laterales minores, profundseque). 4 palatales flexuosae, longute, perlucentes, 3 ab apertura visibiles. Peristoma exalbido purpurescens, vel rufo-castaneus, callosum valde reflexum, margo superior sub-dentate crassior, inferior dente valido atquse quadrato armatur. " Diam. maj. 26, min. 20, alt. 8 ; {Qude.) Hab. Ceylon: Albion Estate, Lindula Districts {Mrs. Fry); Ambegamuwa {Collett).. Fig. 19.—Corilla Jh/f
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Keywords: ., bookauthorg, bookcentury1900, bookdecade1900, booksubjectmollusks
