Caldwell, Studies in the Constitutional History of Tennessee (Cincinnati, 1895; new ed., 1907).
The development of Phoronis was supposed by Caldwell (2) to furnish the explanation of the relations of the surfaces in Brachiopoda, Polyzoa and perhaps the Sipunculoid Gephyrea, in which the ontogenetic evidence is less clear.
(1898); Wieland, " American Fossil Cycads," Carnegie Institution Publication (1906); Stopes, " Beitrage zur Kenntnis der Fortpflanzungsorgane der Cycadeen," Flora (1904); Caldwell, " Microcycas Calocoma," Bot.
A remarkable exception to this rule has recently been mega- recorded by Caldwell, who found that in Microcycas.
Other institutions at Danville are Caldwell College for women (1860; Presbyterian), and the Kentucky state institution for deaf mutes (1823).