RT Journal Article SR Electronic T1 The sedentary habits of Platyceras. JF American Journal of Science JO Am J Sci FD American Journal of Science SP 269 OP 272 DO 10.2475/ajs.s3-36.214.269 VO s3-36 IS 214 A1 Charles Rollin Keyes YR 1888 UL http://www.ajsonline.org/content/s3-36/214/269.abstract AB