scHucHERT.] INDEX AND BIBLIOGRAPHY. 379 



Seminula subquadrata Hall. Kaskaskia (L. Carb.). 



Athyris subquadrata Hall, Geol. Survey Iowa, I, Pt. II, 1858, p. 703, pi. 27, fig. 

 2, woodcut p. 708.— Whitfield, Annals N. Y. Acad. Sci., V, 1891, p. 585, pi. 

 14, figs. 1-3;— Geol. Ohio, VII, 1895, p. 472, pi. 10, figs. 1-3.— Keyes, Geol. Sur- 

 vey Missouri, V, 1895, p. 92. 



Athyris subquadrata? Hall and Whitfield, King's U. S. Geol. Expl. 40th Pari., 

 IV, 1877, p. 271, pi. 5, figs. 19, 20. 



Seminula subquadrata Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 95, 

 pi. 47, figs. 7-9, 15, 16; pi. 84, figs. 30, 31. 



Loc. Chester, Illinois; Crittenden County, Kentucky; Newton ville and Maxville, 

 Ohio; Oquirrh Mountains, Utah. 



Ohs. See Cleiothyris clintonensis. 



Seminula titicacaensis (Gabb). Upper Carboniferous. 



Terebratula titicacensis Gabb, Jour. Acad. Nat. Sci. Philadelphia, 2d ser., VIII, 



1881, p. 302, pi. 42, fig. 11. 

 Loc. Lake Titicaca, Bolivia. 



Seminula trinucleus Hall. St. Louis (L. Carb.)- 



Terebratula triuucleus Hall, Trans. Albany Institute, IV, 1858, p. 7; — Geol. Sur- 

 vey Iowa, I, Pt. II, 1858, p. 659, pi. 23, figs. 4, 5. 



Athyris trinuclea Whitfield, Bull. American Mus. Nat. Hist., I, 1882, p. 50, pi. 6, 

 figs. 22-27.— Hall, Twelfth Eep. State Geol. Indiana, 1883, p. 329, pi. 29, figs. 

 22-27. 



Seminula trinuclea Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, pp. 94, 95, 

 fig. 65; pi. 47, figs. 5, 6, 10-14. 



Log. Bloomington and Spergen Hill, Indiana; Alton, Illinois; Boonville, Mis- 

 souri; Princeton, Kentucky. 



Ohs. See Cleiothyris reflexa. 



Seminula wasatchensis (White). Upper Carboniferous. 



Rhynchonella wasatchensis White, Wheeler's Expl. and Survey west of 100th 



Meridian, Prel. Rep. 1874, p. 19;— Ibidem, Final Rep., 1875, p. 130, pi. 9, fig. 3. 



Loc. Wasatch Range, near Provo, Utah. 



Ohs. Is related to S. subtilita. The great anterior thickening is due to old age. 



Sieberella CEhlert, and Hall and Clarke=:Gypidula. 



Ohs. It may prove that Sieberella will be useful as a subgenus of Gypidula. 

 SIPHON OTRETA de Yern. Genotype Crania unguiculata Eicliwald. 



Siphonotreta de Verneuil, G^ol. de la Russie d'Europe et des Mont, de I'Oural, 

 II, 1845, p. 286.— Dall, Bull. U. S. Nat. Mus., 8, 1877, p. 62.— Hall and Clarke, 

 Pal. New York, VIII, Pt. I, 1892, pp. 110, 167.— Winchell and Schuchert, 

 Minnesota Geol. Survey, III, 1893, p. 358.— Hall and Clarke, Eleventh Ann. 

 Rep. N. Y. State Geologist, 1894, p. 252. 



Siphonotreta (?) micula McCoy. Calciferous (Ord.). 



Siphonotreta ? micula Ami, Rep. Progress Geol. Nat. Hist. Survey Canada for 



1887-88, 1889, p. 52K. 

 Loc. Great Britain ; near Laevis, Canada. 



Siphonotreta (?) minnesotaensis Hall and Clarke. Trenton (Ord.). 



Siphonotreta ? minnesotensis Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, 



pp. 112, 177, pi. 4, figs. 37, 38.— Winchell and Schuchert, Minnesota Geol. 



Survey, III, 1893, p. 358, pi. 29, figs. 23, 24. 

 Loc. Minneapolis, Minnesota. 



Siphonotreta scotica Whiteaves=Schizambon % fissus americanus. 

 SPH^ROBOLUS Matthew. Genotype Lingulella ? spissa Billings. 



Sphasrobolus Matthew, Trans. Royal Soc. Canada, 2d ser., I. 1896, p. 263. 



