. Bulletin - United States National Museum. Science. EASTERN PROVINCE —SOUTHERN REGION SPECIES. 345 Family TESTACELLIDJE. OLAIVDINA, ScHUM. Shell oblong, fusiform, horn-colored; whorls 6-8, the last attenuated at base; aperture narrow, c'lliptically oblong: peristome simple; columella twisted for- ward at the base and trun- cated ; suture often crenu- lated or margined; uniform in color or ornamented with Glandinatru7icata, one-hidi the natural size. longitudinal, usually brownish streaks. Animal heliciform, elongated, narrowed anteriorly; eye-peduncles long, having the eye-spots on t
. Bulletin - United States National Museum. Science. EASTERN PROVINCE —SOUTHERN REGION SPECIES. 345 Family TESTACELLIDJE. OLAIVDINA, ScHUM. Shell oblong, fusiform, horn-colored; whorls 6-8, the last attenuated at base; aperture narrow, c'lliptically oblong: peristome simple; columella twisted for- ward at the base and trun- cated ; suture often crenu- lated or margined; uniform in color or ornamented with Glandinatru7icata, one-hidi the natural size. longitudinal, usually brownish streaks. Animal heliciform, elongated, narrowed anteriorly; eye-peduncles long, having the eye-spots on the posterior face, behind the tips, which are deflected ; tentacles hall the length of the eye-peduncles, bulbous, and somewhat deflected at tip ; on each side of the oral aperture is a retractile, palpiform appendage, attenuated at tip and more or less re- curved, nearly as long as the eye peduncle, the bases separated bya Assure in front; buccal pouch capable of a proboscidiform protrusion, tlie aperture furnished with three papilhe ^ a1)<)ve and three on each side. Genital ori- licc at some distance behind the right eye- l)e(luncle. Anal and respiratory orifices on the right of the mantle, under the peristome of the shell. Mantle thin, posterior, COV- Lingual membrane of G. <nmca«a. ered b3' a well-developed shell. No distinct locomotive disk. !N^o caudal mucus pore. The eggs are 8™™ long, covered with a hard, calcareous shell. The subgenera Varicella and Oleacina, s. str., are not found within our limits, but only the Subgenus GLAJ^DINA, s. str. Shell ovate or ovate-oblong, plicately striate, generally of a silken luster, but never glittering, and usually decussated with delicate revolv- ing lines; suture crenulated : aperture equaling about half the shell's length, its peristome Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustra
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