. The Conchologists' exchange. Mollusks. The Nautilus Vol. XII. JULY, 1898. No. 3. A NEW JAMAICAN LAND SHELL. BY J. B. HENDERSON, JR. Bavenia Hollandi n. s. Imperforate, rather thin, subtranslucent, pale horn color. Whorls 10, well-rounded, sutures impressed ; from 30 to 35 somewhat strongly- developed longitudinal waving ribs upon each whorl, except upon the two apical which are perfectly smooth. Apex obtuse. Aperture ear shaped, much narrowed in the middle, suggestive of the figure 8. Columella strongly twisted like the letter "S,"and thickened. Outer lip slightly pinched in the mi
. The Conchologists' exchange. Mollusks. The Nautilus Vol. XII. JULY, 1898. No. 3. A NEW JAMAICAN LAND SHELL. BY J. B. HENDERSON, JR. Bavenia Hollandi n. s. Imperforate, rather thin, subtranslucent, pale horn color. Whorls 10, well-rounded, sutures impressed ; from 30 to 35 somewhat strongly- developed longitudinal waving ribs upon each whorl, except upon the two apical which are perfectly smooth. Apex obtuse. Aperture ear shaped, much narrowed in the middle, suggestive of the figure 8. Columella strongly twisted like the letter "S,"and thickened. Outer lip slightly pinched in the middle where it is armed with a prominent tooth. Alt. 9 mm. "Jamaica," Dr. W. J. Holland. The genus Bavenia was created in 1873 by Crosse (Journal de Conch., Vol. 21, p. 69) to include a single species from Curacoa, R. blandi (do. Vol. 22, pi. 2, fig. 4). The author remarks that the form is an eccentric one "between Spiraxis and ; Tryon, in St. and Syst. Conch. (Pt. 3, p. 18), in- cludes the genus within the Streptazidce. The exact position of this curious genus is doubtful, and, without a knowledge of the anatomy, cannot definitely be placed. It is not unlikely, however, that it will fall within the Sienogyridce, probably next to Spiraxis. The character of the constriction in the centre of the outer lip is common to Spiraxis, and is sometimes to be observed in Varicella, the Jamaican section of Ghindina. There. 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 Averell, William D. Philadelphia, Wm. D. Averell
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
