A Critical Summary of Troost's Unpublished Manuscript on the Crinoids of Tennessee. E-book. Formato PDF Elvira Wood   -  Forgotten Books, 2017  - 

NO doubt it is as correct as such lists can be expected to be, and in every respect a monograph would be a highly valuable addition to our knowledge; and I am happy to be able to state that Professor Troost is preparing a monograph of all these crinoids, illustrated by 220 figures. The list contained the names of Only 85 Of the 108 species described in the final paper.