378 SYNOPSIS OF AMERICAN FOSSIL BKACHIOPODA. [uull.87. 



Seminula caput-serpentis (Swallow). Upper Carboniferous. 



Spirigera cai)iitscrpeutis ^Swa,llo^Y, Trans. St. LouiB Acad. Sci,, II, 18G3, p. 90. 



Loc. Missouri aiul Kansas. 



Oha. Regarded by Keyes as a synonym for S. argentea. 



Seminula charitonensis (Swallow). Upper Carboniferous. 



Spirigera charitonensis Swallow, Trans. St. Louis Acad. Sci., I, 1860, p. 651. 

 Loc. Chariton and Randolph connties, Missouri. 

 Ohf Probably a synouym for Seminula argentea. 



Seminula claytoni (Hall and Whitfield). Kinderhook (L, Carb.). 



Athyris claytoni Hall and Whitfield, King's U. S. Geol. Expl. 40th Pari., IV, p. 256, 



1877, pi. 4, figs. 15-17. 

 Loc. Little Cottonwood, Wasatch Range, Utah. 



Seminula dawsoni Hall and Clarke. Upper Carboniferous. 



Athyris subtilita Davidson (non Hall), Quart. Jour. Geol. Soc. London, XIX, 



1863, p. 170, pi. 9, figs. 4, 5.— Dawson, Acadian Geology, 3d ed., 1878, p. 290, 



fig. 88. 

 Seminula dawsoni Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, pp. 95, 96, 



364, figs. 69-71; pi. 47, figs. 32-34. 

 Loc. Windsor, Nova Scotia. 



Seminula formosa (Swallow). Keokuk (L. Carb.). 



Spirigera formosa and euzona Swallow, Trans. St. Louis Acad. Sci., II, 1863, p. 91. 

 Athyris formosa Keyes, Geol. Survey Missouri, V, 1895, p. 91. 

 Loc. Boonville, Missouri. 



Seminula hawni (Swallow). Upper Carboniferous. 



Spirigera hawni Swallow, Trans. St. Louis Acad. Sci., I, 1860, p. 652. 



Lgc. Missouri. 



Ois. Probably a synonym for Seminula argentea. 



Seminula maconensis (Swallow). Upper Carboniferous. 



Spirigera maconensis Swallow, Trans. St. Louis Acad. Sci., I, 1860, p. 651. 

 Loc. Montgomery County, Missouri. 



Seminula parva (Swallow). Keokuk (L. Carb.). 



Terebratula parva Swallow (non d'Archiac, 1846), Trans. St. Louis Acad. Sci., 

 II, 1863, p. 83.— Keyes, Geol. Survey Missouri, V, 1895, p. 105. 



Terebratula cooperensis Miller, N. American Geol, and Pal., 1889, p. 384. 



Loc. Keokuk, Iowa; Monroe and Cooper counties, Missouri. 



Ois. Specimens of this species in Professor Hall's collection seen by the writer 

 do not'show a punctate shell structure, but are distinctly fibrous. 



Seminula persinuata (Meek). Carboniferous. 



Athyris (?) persinuata Meek, King's U. S. Geol. Expl. 40th Pari., IV, 1877, p. 81, 



pi. 9, fig. 4. 

 Loc. White Pine district, Nevada. 



Seminula (?) plattensis (Swallow). Upper Carboniferous. 



Spirigera plattensis Swallow, Trans. St. Louis Acad. Sci., II, 1863, p. 87. 

 Loc. Missouri; Kansas; Nebraska. 



Seminula (?) rogersi Hall and Clarke. Upper Helderberg (Dev.). 



Seminula rogersi Hall and Clarke, Pal. New York, VIII, Pt. II, 1895, pp. 97, 364, 



pi. 47, figs. 1-4. 

 Loc. Pendleton, Indiana. 



Seminula singletonii (Swallow). Upper Carboniferous. 



Spirigera singletonii Swallow, Trans. St. Louis Acad. Sci., II, 1863, p. 87. 

 Loc. Boone and Audrain counties, Missouri. 

 Ohs. Probably a synonym for Seminula argentea. 



