STATE GEOLOGIST. 103 



Besses great economical and scientific intercut, I have thought 

 best to enter into a greater amount of local and stratigraphical 

 detail than I have done in respect to the other groups. For the 

 determination of the parallelism between this formation and the 

 carboniferous limestones of the North-west, lithological con- 

 siderations become the more important, from. the great scarcity 

 of fossils in our formation, and the entire, absence of those 

 forms which furnish the means of certain identification in In- 

 diana, Illinois, Missouri and other States. 



Prom the account which has been given, there is obvous diffi- 

 culty in identifying our limestone with any of the groups that 

 have been established by the researches of Owen, Hall, Swal- 

 low, Worthen, McChesney and others. Little attention has 

 yet been given to fossil remains, .but the following notes of 

 species thus far observed, may be here recorded: 



Notes on the Fossils of the Carboniferous Limestone of Michigan. 

 [The numbers prefixed refer to the University Catalogue.] 



231. Lithostrotion raammillare, Edwards and LTaime. 



The specimens agree entirely with figures and descriptions 

 by Hall (Iowa Kep.) and Owen (Geol. Iowa, Wisconsin, &c.) 



Localities — Grand Eapids and boulders in that vicinity. 



2f>0. Lithostrotion (Lithodendron) longieonicnm ? Phillips. 

 This abundant, generally distributed, luxuriantly csespitose 

 and branching Cyathophylloid, presents externally the non- 

 striated appearance of L. longiconicum, while it has the oval 

 columella of L. sociale, Phillips. It is less straight than 

 either of these species, and not improbably constitutes a dis- 

 tinct type. 

 Localities — Grand Eapids, [Belle vue, Great Charity Island^ 



Pt. au Gres. 



252. Cyathophyllum fungites,1Z)e Koninck. 

 These specimens considerably resemble Turbinolia fungUes", 

 Fleming, (Phillips, Geol. Yorkshire, PI. Ill, Fig. 23^, They 

 are less broad than the figure of De Koninck, (Animaux Foss. 

 de Belg. PI. D, Fig. 2,) but agree well with Owen's figure of 

 the same, (Iowa, &c, Table IV, Fig. 4.) The last .named is 

 reported from the Keokuk rapids. 



