192 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



bluish gray, one of which came directly out of the gray limestone 

 of that locality. There is also a very dark, flinty specimen from a 

 knob just south of Louisville. 



2. M. clarkensis (Miller and Gurley); said by the authors to be 

 from the Keokuk or Warsaw Group, Clark County, Indiana.^ I have 

 specimens of it from the Knobstone at Stone's farm, and near Henry- 

 ville, Clark County, Indiana, and I have no doubt that the type came 

 from the same horizon; I also have it from Button-mould Knob. 



The genus is well represented in the Lower Burlington by M. 

 hurlingtonensis, and the species, or a similar one, occurs at Fern Glen, 

 Missouri. Fragmentary specimens from Button-mould Knob might 

 also be referred to it, as it can not be distinguished from M. clarkensis 

 by the base alone. Only one doubtful specimen of the genus has 

 been reported from the Upper Burlington, and no indication of it 

 has ever been seen in the typical Keokuk. 



TAXOCRINUS Phillips. 



A highly ornamented form, of which we have only broken parts of 

 calyx and arms, not resembling any Keokuk species, but nearer to 

 an undescribed species from the Lower Burlington at Burlington. 



Locality. — Button-mould Knob; Stone's farm, Clark County, 

 Indiana. 



FORBESIOCRINUS de Koninck and Lehon. 



Calyx plates similar to those from the Mountain Limestone of 

 Tournai, Belgium, were found at Stone's farm, and Palmer's farm, 

 Clark County, Indiana, and Button-mould Knob, Kentucky; also at 

 Fern Glen, Missouri, and Lake Valley, New Mexico. Recent studies 

 of the' type, and some better specimens since found, of de Koninck 

 and Lehon's species, F. noMlis,^ have shown that this is a good genus, 

 and that the name will stand as proposed by the authors. But the 

 Belgian species belongs to a type quite distinct from all the American 

 species which have been described under this name, with the single 

 exception of Hall's Forhesiocrinus communis ^ from the Waverly 

 Group at Richfield, Ohio, a horizon equivalent in part to the Kjiob- 

 stone. 



F. saffordi (Hall),^ the largest species of the genus. The original 

 specimen came from Whites Creek, and is of a preservation much 

 resembling those specimens found in place in the Keokuk beds. 

 I have several specimens of the species from the red clays of the 

 Warsaw horizon at Spergen Hill, Indiana, and there is no doubt 

 that it belongs to the upper, true Keokuk, beds at Whites Creek. 



» BuU. No. 5, Llinois State Mns., p. 43. = Pal. Ohio, vol. 2, p. 169; pi. 12, figs. 4, 5; not fig. 3. 



2 Rech. Crin. Carb. Belg., 1854, p. 121. * Suppl. Geol. Iowa, 18t>0, p. 87. 



