_? Myalina exasperata_ Beede. _Myalina perattenuata_ Meek and Hayden. _Myalina swallowi_ McChesney. _Nucula ventricosa_ Hall. _Pleurophorus tropidopherus_ Meek. _Schizodus curtus_ Meek and Worthen. _Schizodus_ sp. _Solenomya radiata_ Meek and Worthen. _Sedgwickia topekensis_ (Shumard) Meek and Hayden. _Bellerophon_ Cf. _bellus_ Keyes. _Euomphalus subrugosus_ (Meek and Worthen) Meek. _Pleurotomaria perhumerosa_ Meek. _Pleurotomaria sphærulata_ Conrad. _Pleurotomaria subdecussata_ Geinitz. _Orthoceras cribosum_ Geinitz. _Griffithides scitula_ (Meek and Worthen) Vogdes. =27.= HOWARD LIMESTONE. This consists of two thin layers of limestone separated by two to ten feet of shales. The lower of these is a hard, blue limestone from twenty inches to two feet in thickness, quite fossiliferous in places, and sometimes quite full of crinoid stems and of fish teeth. The upper layer is usually coarser and more shaly. The clay between them is often very fossiliferous. From Doctor Adams’s notes, published by Professor Haworth,[8] it will be seen that the Howard limestone is the same as the rock over the Osage coal, and that his Severy shale is the same as the Osage City shales. Some of the fossils here listed were collected from ballast near Lawrence, on the old Carbondale railroad, which was taken from this layer of rock at Carbondale. These references are marked with an asterisk. * _Fusulina secalica_ (Say). * _Campophyllum torquium_ Owen. _Lophophyllum profundum_ (Milne-Edwards and Haime) Foerste. * _Lophophyllum westii_ Beede. _Ceriocrinus monticulatus_ Beede. _Erisocrinus megalobrachius_ Beede. _Scaphiocrinus washburni_ Beede. _Spirorbis_ sp. * _Chainodictyon laxum_ Foerste. _Fenestella dentata_ Rogers. _Fenestella remota_ Foerste. * _Fenestella shumardi_ Prout. _Fistulipora nodulifera_ Meek. _Pinnatopora pyriformipora_ Rogers? _Pinnatopora tenuilineata_ (Meek) Ulrich. _Polypora aspera_ Rogers. _Polypora elliptica_ Rogers. * _Polypora_ sp. _Rhombopora lepidodendroides_ Meek. _Streblotrypa prisca_ Gabb and Horn. _Ambocœlia planoconvexa_ (Shumard) Hall and Clarke. _Chonetes glaber_ Geinitz. _Chonetes granulifer_ Owen. _Derbya crassa_ (Meek and Hayden) Waagen. _Derbya keokuk_ (Hall) Hall and Clarke. _Dielasma bovidens_ (Morton) White. _Enteletes hemiplicata_ (Hall) Hall and Clarke. _Productus cora_ d’Orbigny. _Productus costatus_ Sowerby? de Koninck. _Productus longispinus_ Sowerby. _Productus nebraskensis_ Owen. _Productus pertenuis_ Meek. _Productus punctatus_ (Martin) Morton. _Productus semireticulatus_ (Martin) d’Orbigny. _Pugnax utah_ (Marcou) Hall and Clarke. _Seminula argentia_ (Shepard) Hall and Clarke. _Spirifer cameratus_ Morton. _Spiriferina cristata_ (Schlotheim) Dawson. _Allorisma costatum_ Meek and Worthen. _Allorisma geinitzi_ Meek. _Allorisma granosum_ (Shumard) Keyes. _Allorisma kansasensis_ Beede. _Aviculopecten carboniferus_ (Stevens) Meek. _Aviculopecten hertzeri_ Meek.