RT Journal Article SR Electronic T1 The American Spongilla, a craspedote, flagellate infusorian JF American Journal of Science JO Am J Sci FD American Journal of Science SP 426 OP 436 DO 10.2475/ajs.s3-2.12.426 VO s3-2 IS 12 A1 James-Clark, H. YR 1871 UL http://www.ajsonline.org/content/s3-2/12/426.abstract AB