186 PROCEEDINGS OF THE NATION AL MUSEUM. vol.41. 



Agarlcocrinus, small species with 10 arms. 

 Metichthyocrinus tiaraeformis. 

 Barycrinus cornutus. 

 Barycrinus, cf. rlwmbiferus. 

 Cyatlwcrinus , small smooth species. 

 Cyathocrinus, elongate and highly ornamented. 

 Poteriocrinus, large elongate species. 

 Catillocrinus tennesseensis. 

 Halysiocrinus yer plexus. 

 Synhathocrinus rohustus. 

 Every one of list B was found at Button-mould Knob, but not one 

 of list A. 



The material obtained by Braun from the Knobs, while abundant 

 in quantity, seemed rather discouraging at first, owing to its frag- 

 mentary character. Along with a few complete calices, it consisted 

 mainly of an immense number of loose calyx plates. Many of these, 

 however, were of forms marked by conspicuous and delicate ornamen- 

 tation, such as occur peculiarly in the lower beds at Burlington; 

 and by patiently assorting them, I found that I could separate a large 

 number of specific forms, in some cases finding enough of the differ- 

 ent plates of a form to enable me to reconstruct representative speci- 

 mens, sufficient for figuring hereafter, in the case of several new 

 species. These, added to what I already had from previous collec- 

 tions, notably the Lyon collection acquired by me some years ago, 

 gave me a total of some 45 species from the Knobs, which can be 

 compared with those of other locahties. 



With these explanations, necessary for a proper understanding of 

 the relations of this fauna, I will give a list of the species found in the 

 Knobstone beds of various localities, and some knowTi to be from 

 Keokuk beds, lymg above those under consideration. To save some 

 needless repetition, I will first give the localities to be referred to: 

 George Palmer's farm, Clark County, Indiana. 

 Stone's farm, 9 miles southeast of Borden County, Indiana. 

 Near Henryville, Clark County, Indiana. 

 Williams' farm, near Rush Creek, Indiana. 

 Button-mould Knob, Bullitt County, Kentucky. 

 Bradbury Knob, Bullitt County, Kentucky. 

 Jacobs Knob, Bullitt County, Kentucky. 

 Bells Knob, Marion County, Kentucky. 

 BradfordsvUle, Marion County, Kentucky. 

 Sallietown, Marion County, Kentucky. 

 Wliites Creek, Davidson County, Tennessee. 

 Fern Glen, 20 miles west of St. Louis, Missouri. 



