llic Fauna of the Maxvillc Liuicstonc. 377 



ments of the smaller shells may be readily separated from 

 Scniiinila sitbquadrata and Diclasma tiirgida by the absence of 

 the round foramen and from the latter also by the absence of the 

 punctate surface. 



Horizon and locality. — ]\laxville limestone. 

 Upper zone: Mouth of Ihickeye Fork, Fultonham ; Gladstone 



Mills. Thompson Residence, Below Thompson Residence, 



White Cottage. 



SPIRIFER KEOKUK-HaU. 



18.5-2. S/^irifcr attcniiatiis. Owen, Geol. Rep. Wis., Iowa, and Minn., 

 tab. o, fig. 5, tab. .3 A, fig. 18. 

 Lower Carboniferous limestone: Skunk River, Iowa. 

 Carboniferous limestone: Keokuk Rapids of the Mississippi. 

 1858. Spirifcr kcokiik. Hall, Geol. Iowa, Vol. I, pt. II, p. 642, pi. 20, 

 figs. 3 a-d, 2d. 

 Keokuk limestone : Keokuk, Iowa : Xauvoo and Warsaw, Illinois. 

 1858. Spirifcr keokuk var. Hall, Geol. Iowa, A'ol. I, pt. II. p. 676, pi. 24, 

 figs. 4 a-d. 

 St. Louis limestone : Mouth of Lizard Creek, Iowa. 

 1876. Spirifcr keokuk (?) Meek, Bull. U. S. Geol. and Geog. Surv. 

 Terr., Vo]. H, p. 355, pi. 1, figs. 3, 3a. 

 Carboniferous: Kootenaj^ Range of Rocky Mountain. 

 1883. Spirifcra keokuk. Hall, Rep. N. Y. State Geol. for 1882, pi. (30) 

 55, figs. 21-24. 

 Keokuk and St. Louis limestone: Keokuk, Lizard Creek, and 

 Marion County, Iowa. 

 1888. Spirifcr keokuk. Herrick, Bull. Denison Univ., Vol. IV, p. 114. 



Waverly group : Rushville and Loudonville, Ohio. 

 1888. Spirifcr incrcheseeus. Herrick, Bull. Denison Univ., Vol. \\\ pi. 

 11, figs. 14, 23. 

 Chester limestone : Ohio. 



Limestone fragments in Coal Measures: Licking County. Ohio. 

 1801. Sfirifer Rockyuiontaua / \\'hitfield, Ann. X. Y. Acad. Sci., Yo\. 

 V, p. 584. pi. 13, fig. 20. 

 Maxville limestone: Xewtonville, Ohio. 

 1804. Spirifcr keokuk. Hall and Clarke, Int. Study of Rrach., pt. 2. 

 pi. 27, figs. 14, 15. 

 Keokuk grf)up : Keokuk, Iowa. 

 1804. Spirifcra keokuk. Keyes, Mo. Geol. Surv., Vol. V, p. 81, pi. 40, 

 fig. 2. 

 Kef)ki'k limestone: Wayland. Missouri; Keokuk, Iowa. 



