STATE GEOLOGIST. 105 



the fenestrules. This species is scarcely distinguishable 

 from specimens collected from the St. Louis limestone, two and 

 a-half miles west from Charboniere, on the Missouri Hiver. 

 It must bear considerable resemblance to F. patula, McCoy. 

 Locality — Grand Rapids. 



241. Fenestella, sp.? 



The rays are very narrow and flexuous between the lines of 

 small roundish fenestrules. No cellules have been seen. 



Locality — rGrand Rapids. 

 240. Polypora, sp.? 



Allied to P. Shumardii, Prout, (Trans. Acad. St. Louis, I., p. 

 271), a Devonian species. The cellules are exceedingly mi- 

 nute and indistinct, though I imagine the specimen shows 

 the reverse side 



Locality — Grand Rapids. 



242. Cladopora(?) sp? 



Prof. Hall's characterization of this genus, (Pal. of N. Y., II, 

 131,) does not disagree with these specimens. 

 Locality — Grand Rapids. 



243. Cladopora, sp? • 

 The cellules are promiscuously arranged upon a flattened, 

 branching axis. 



Locality — Great Charity Isl and. 



244. Coscinium (?) 



Fenestrules quincuncially disposed on a flattened branching 

 axis, which is minutely porous. 



Locality — Great Charity Island. 



245. Monticulipora (?) sp? (Rhinopora, Hall.) 



Minute, polygonal, crowded, rayless pores or cells, irregularly 

 studding the surface of a compressed, lobated, subspheroidal 

 mass. 



Locality — Grand Raptds. 



247. Ptilodyctia(?) sp? (Stictopora, Hall.) 



A branched, nearly terete stem, with pores apparently on all 

 sides. 



Locality — Grand Rapids. 



BKACHIOPODA. 



201. Productus Altonensis, Norwood and Pratten, (Journal Acad. 

 Nat. Sci, Phil. [2| III, 7.) 



Agrees very well. It bears some resemblance to P. costatus 

 Sowerby, Far, Hall, (Iowa Rep. p. 112,) but it is hardly 

 14 



