NO. 3 ON THE FOSSIL CRINOID FAMILY CATILLOCRINIDAE 3 



the author had seen the specimens used by Troost, obtained at White's 

 Creek Springs, Tennessee, and he credited Troost with the names of 

 the genus and species, but made the descriptions according to his own 

 observations. 



The horizon was staled by Shumard to be the Keokuk, in con- 

 formity with the opinion of the earlier geologists ; but it is now known 

 to be the New Providence shale (Knobstone), a much earlier forma- 

 tion at the base of the Lower Carboniferous, more or less equivalent 

 to the Lower Burlington, Chateau of Missouri, Waverly of Ohio, 

 and the Mountain limestone of Britain and Belgium (see Springer, 

 Crin. Faun. Knobstone, Proc. U. S. Nat. Mus., vol. 41, 1911, pp. 

 175-208) . 



No figure of the type species was given by Shumard ; but the form 

 was so peculiar, and unlike any other then known, that there was 

 never any difificulty in recognizing it from the description. The first 

 published illustration of a specimen belonging to this genus was given 

 by Meek and Worthen in 1868, under their species C. wachsmutki, 

 from the Upper Burlington limestone (Geol. Surv. 111., Ill, pi. 18, 

 fig. 5). This was followed in 1873 by their species C. bradleyi, from 

 the Crawfordsville beds of the Keokuk {Op. cit., V, pi. 14, figs. 10 

 a, b). C. wachsmuthi was further illustrated by Wachsmuth and 

 Springer in 1886 (Rev. pt. Ill, pi. 5, figs. 15, 16). The range of the 

 genus was extended into the Chester (Kaskaskia) through a species 

 described by Wachsmuth in 1882 under the name Allagecrinus car- 

 penteri (Bull, i. 111. St. Mus., p. 40; Geol. Surv. 111., VII, pi. 29, fig. 

 14) . The reference to Allagecrinus was made under a misunder- 

 standing of the characters of a sohtary specimen found by Pro- 

 fessor Worthen in Monroe County, Illinois. In the course of col- 

 lections made for me in recent years at the same locality, I obtained 

 several specimens of this small crinoid in such preservation as to 

 establish beyond question its identity with Catillocrinus, and also to 

 show that it is the same form which had been previously found in 

 equivalent strata at Huntsville, Alabama. In the meantime another 

 small species appeared among my collections from Indian Creek, 

 Montgomery county, Indiana, in a horizon of the Keokuk slightly 

 lower than that of C. bradleyi, which has remained undescribed until 

 now. 



Thus we have in the American rocks a geological range for this 

 greatly specialized genus extending from the earliest to the latest 

 Lower Carboniferous, and occurring in most of its major sub- 

 divisions; while the genus itself is the most vigorous representative 



