. Mollusca ... Mollusks. 68 HELICIDJE. CoriUa rivolii, Frauenfeld, Verb. If. K. Ges. xix, 1869, p. 876; Tryon, Struct. Conch, iii, 1884, p. 33, pi. 94, fig. 24; Pilsbry, Man. Oonch. ser. 2, ix, 1894, p. 148, pi. 41, figs. 20-22 ; Gude, Science Gossip, n. s. iii, 1896, p. 91, figs. 8, 9 (shell and armature). Helix (Atopa) rivolii, Tryon, Man. Conch, ser. 2, iii, 1887, p. 156, pi. 33, figs. 11, 12. Original description :—" H. testa alba, vitrea, utroque latere coneavo-planulata, ellipsoidea; spira irregulari, superne striata, inferne Isevigata; ant'ractibus gyratis, ultimo majors
. Mollusca ... Mollusks. 68 HELICIDJE. CoriUa rivolii, Frauenfeld, Verb. If. K. Ges. xix, 1869, p. 876; Tryon, Struct. Conch, iii, 1884, p. 33, pi. 94, fig. 24; Pilsbry, Man. Oonch. ser. 2, ix, 1894, p. 148, pi. 41, figs. 20-22 ; Gude, Science Gossip, n. s. iii, 1896, p. 91, figs. 8, 9 (shell and armature). Helix (Atopa) rivolii, Tryon, Man. Conch, ser. 2, iii, 1887, p. 156, pi. 33, figs. 11, 12. Original description :—" H. testa alba, vitrea, utroque latere coneavo-planulata, ellipsoidea; spira irregulari, superne striata, inferne Isevigata; ant'ractibus gyratis, ultimo majors, ad aperturam depressis ; apertura dilatata, tubseformi obliqua, rotundato-semi- lunari, intus quinquedentata; dente coUumellari alteris ; Major diam. 23-25, minor 16-5-17, alt. 6-25-7 mm. Hah. Ceylon {Templeton) ; Kandy (Nevill, Preston). When describing Helix rivolii in 1830 Deshayes was probably unaware of the fact that the shell figured by I'erussac as Helice carahinata was identical with his own. In 1838, however, when editing the second edition of Lamarck's ' Animaux sans Vertebres,' he acknowledges Ferussac's name and relegates rivolii to the synonymy, reversing the process when editing Ferussac's Hist. Nat. Moll. (vol. i, p. 7, 1839), where he states that doubtless Ferussac had provisionally so-named the species, and that he has searched the dictionaries in vain for the meaning of the word carahinata. Por this reason he thought it advisable to retain for the species the name he had himself proposed for it in 1830. While a few of the older authors adopted Ferussac's name, every one dealing with the species since 1850 has recognized Deshayes' designation. Although Fcrussac did not give a description and livraison x, containing plate 51 b (numbered 101 in some copies) on which the species is figured, had no text with it, two sheets of ' Explication des Planches ' were issued with livraison xvi in 1822 *, on page iii of which the name H. carahinata duly occ
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