PT - JOURNAL ARTICLE AU - Dana, James D. TI - The classification of animals based on the principle of cephalization; Part III, Classification of herbivores AID - 10.2475/ajs.s2-37.110.157 DP - 1864 Mar 01 TA - American Journal of Science PG - 157--183 VI - s2-37 IP - 110 4099 - http://www.ajsonline.org/content/s2-37/110/157.short 4100 - http://www.ajsonline.org/content/s2-37/110/157.full SO - Am J Sci1864 Mar 01; s2-37