. Mollusca ... Mollusks. 1-1-i HBLICIDiE. proportion to the diameter; in the last whorl not widening suddenly at the aperture, and in the lower side sloping from the periphery to the umbilical angulation; the right margin of the peristome is depressed; the umbilicus is deeper, and the hori- zontal median parietal fold does not quite reach the apertural ridge. The shell is darker in colour and more strongly ribbed. Major diam. 19, minor 15 mm.; alt. 7 mm. Hah. Burma: Moulmain. The variety obesa is darker in colour than the type, being of a fuscous chestnut. It is more compressed and distinctly
. Mollusca ... Mollusks. 1-1-i HBLICIDiE. proportion to the diameter; in the last whorl not widening suddenly at the aperture, and in the lower side sloping from the periphery to the umbilical angulation; the right margin of the peristome is depressed; the umbilicus is deeper, and the hori- zontal median parietal fold does not quite reach the apertural ridge. The shell is darker in colour and more strongly ribbed. Major diam. 19, minor 15 mm.; alt. 7 mm. Hah. Burma: Moulmain. The variety obesa is darker in colour than the type, being of a fuscous chestnut. It is more compressed and distinctly ribbed ; the shell is higher in proportion to the diameter, and the umbilicus. c Fig. 75.—Flectopylis hciisovi, rar. ohcfn. is deeper; the last whorl does not widen suddenly, and the right margin of the peristome is depressed, the aperture being conse- quently somewhat ear-shaped; the lower side slopes from the peripheral region to the umbilical angulation. The armature does not differ materially from that of the type, except that the median horizontal parietal fold does not quite reach the apertural ridge. Six specimens were received by me from the late Miss Linter, five of these being more or less decorticated. Var. venusta, Oucle. Flectopylis achatina, var. venusta, Crude, Science Gossip, n. s. v, 1898, p. 134, fig. 85. Differs from the type and the other varieties in being smaller. It resembles the variety obesa in the deeper umbilicus, in the sloping underside, in the comparative height of the shell, and in the median parietal fold not reaching the apertural ridge, but (he last whorl widens more, as in the type. In colour it is pale yellowish-white, flammulated with chestnut above and at the side. The peristome is livid brown, the left margin paler, the right margin a little depressed. Major diam. 17, minor 14 mm.; alt. 7 mm. Bab. Burma. The variety venusta is smaller than any form of P. bensoni I have seen. It is pale yellowish-white in colour, flammulated with. Please
Size: 1773px × 1409px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorg, bookcentury1900, bookdecade1900, booksubjectmollusks
