1905 
1909 
1912 
*1861 
1867 
1876 
1877 
1883 
1885 
1895 
1905 
Perrinilla Pl'ars. 92 
Planorbina (Perrinilla) utahensis utahensis (Meek). 
Planorbis Utahensis, Meek, (61a) Proc. Acad. Nat. Sci. Phila- 
delphia XII. p. 314. 
Planorbis Utahensis, Conrad, (67b) Smithsonian Misc. Qoll. VII, 
6, No. 200, p. 10. 
Planorbis Utahensis, White, (75a) Report upon U. S. Geogr. 
Surveys west of the One Hundreth Meridian IV, 1, Paleont. 
p. 209, tab. XXI, fig. 8a. 
Planorbis spectabilis var. Utahensis, Meek, (76b) in Simpson, 
(76a) Report of the Exploration across the Great Basin of the 
Territory of Utah ... p. 365, tab. V, fig. 8a—c. 
Planorbis spectabilis var. Utahensis, Meek, (77a) U. S. Geol. 
Exploration of the Fortieth Parallel IV, 1, p. 190, tab. XVII, 
fig. 14—14c. 
Planorbis utahensis, White, (77c) Bull. U. S. Geol. a. Geogr. Sur- 
vey of the Territories III, p. 611. 
Planorbis utahensis, White, (83a) Report U. S. Geol. Survey III, 
1882, p. 447, tab. XXIX, fig. 4—9. 
Planorbis spectabilis var. utahensis, Marcou, (85a) Proc. U. S. 
Nat. Mus. VIII, p. 337, 338. 
Planorbis utahensis, Marcou, (85a) Proc. U. S. Nat. Mus. VIII, 
p. 338. 
Planorbis utahensis, White, (95a) Bull. U. S. Geol. Survey. No. 
128, p. 80. 
Planorbis spectabilis var. utahensis, Schuchert, (05a) Bull. U. S. 
Nat. Mus. No. 58, I, p. 154. 
Planorbis utahensis, Schuchert, (05a) Bull U. S. Nat Mus. 
N0- 58. I p. 515. 
Planorbis utahensis, Grabau and Shimer, (09a) North Ameri- 
can Index Fossils, Invertebrates I, p. 819, Textfig. 1206 m-—o. 
Planorbis utahensis, Cockerell and Henderson, (12a) Bull. Ame- 
rican Mus. Nat. Hist. New York XXXI, p. 233. 
Vorkommen: U. Eocün, Lutétien: Bridger beds: Hans 
Fork b. Fort Bridger (Wyoming), Pine Mountain (Utah). 
Castle Valley (Utah), Washakie beds (Wyoming). 
Bemerkung: ?Bereits Wasatch und Green hiver beds! 
Planorbina (Perrinilla) utahensis spectabilis (Meek). 
Planorbis spectabilis, Meek, (61a) Proc. Acad. Nat. Sci. Phila- 
delphia XII, p. 314. 
Planorbis spectabilis, Conrad, (67b) Smithsonian Misc. Coll. VII, 
6, No. 200, p. 10. 
Planorbis spectabilis, Meek, (76b) in Simpson (76a) Report of 
the Exploration across the Great Basin of the Territory of 
Utah ...-p. 806, inb. V, fig. 7a—d. 
Planorbis spectabilis, Meek, (77a) U. S. Geol. Exploration of the 
Fortieth Parallel IV, 1, p. 189, tab. XVII, fig. 13—13f. 
Planorbis utahensis, var. spectabilis, White, (83a) Report U. S. 
Geol. Survey III, 1882, p. 447, tab. XXIX, fig. 4—9. 
Planorbis spectabilis, Marcou, (85a) Proc. U. S. Nat. Mus. VIII. 
Ded. 
Planorbis spectabilis, White, (95a) Bull. U. S. Geol. Survey, No. 
128, p. 80. 
Planorbis spectabilis, Schuchert, (05a) Bull U. S. Nat. Mus. 
No. 53, L, p.. 514, 

