. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BULIMULUS. 391 Fig. 274. marked with spots and obsolete blotches of horn-color; spire conic, acute; whorls 6|, rather convex, the last about as long as the spire, hardly attenuated at base; columella with a small dentiform fold; aperture scarcely oblique, acuminately oblong, brownish within; peristome straight, its right margin somewhat arched, its columellar margin broad- ened above, spreading. Length 33, diameter 14-15 mill.; of aperture, length 16-17, breadth 1\ mill. One of the uniformly white forms of the species
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BULIMULUS. 391 Fig. 274. marked with spots and obsolete blotches of horn-color; spire conic, acute; whorls 6|, rather convex, the last about as long as the spire, hardly attenuated at base; columella with a small dentiform fold; aperture scarcely oblique, acuminately oblong, brownish within; peristome straight, its right margin somewhat arched, its columellar margin broad- ened above, spreading. Length 33, diameter 14-15 mill.; of aperture, length 16-17, breadth 1\ mill. One of the uniformly white forms of the species is figured in Fig. 274, and two of the same from the table-land west of Fort Clark, figured in Fig. 272, show the variation in breadth of which the species is capable. Jaw as usual in the genus; nu- merous delicate ribs ; a strong upper muscular attachment. There are about 76 rows of teeth on the lingual membrane of B. alternatus, each consisting of 75 (37—1—37.) teeth. Central teeth long, unicuspid, bluntly pointed, the laterals bicuspid, modified as they pass off laterally into the marginals. Genitalia not observed. Fig. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1800, bookdecade1870, booksubjectzoology
