BIBLIOGBAPHIC LIST OF GENEEA AND SPECIES. 931 



Pachydictya occldentalis Ulrich. 



Pachydictya occidentalis Ulrich, 14th Ann. Rep. Geol. Nat. Hist. Surv. Minne- 

 sota, 1886, p. 75; Geol. Minnesota, 3, 1893, p. 151, pi. 8, figs. 20-27; pi. 9, 

 figs. 6-10. 



Black River (Decorah): St. Paul and Goodhue County, Minnesota. 



Cotypes.— Cat. No. 43582, U.S.N.M. 



Pachydictya pumila Ulrich. 



Pachydictya pumila Ulrich, Jour. Cincinnati Soc. Nat. Hist., 12, 1890, p. 186, 



fig. 11 ; Geol. Minnesota, 3, 1893, p. 157, pi. 10, figs. 1-4; pi. 8, figs. 4, 5. 

 Rhinidictya humilis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 12, 1890, p. 185, 



fig. 10. 

 Trenton: Cannon Falls, Minnesota (Prosser); Trenton Falls, New York. 

 Cotypes.— Cat. No. 43702, U.S.N.M. 



Pachydictya pumila sublata Ulrich. 



Pachydictya pumila var. sublata Ulrich, Geol. Minnesota, 3, 1893, p. 158. 

 Trenton (Prosser): Cannon Falls, Minnesota. 

 Cotypes.— Cat. No. 43585, U.S.N.M. 



Pachydictya robusta Ulrich. 



Pachydictya robusta Ulrich, Jour. Cincinnati Soc. Nat. Hist., 5, 1882, p. 173, 



pi. 8, figs. lOa-c. 

 Chazyan (Ottosee): Knoxville, Tennessee. 

 Cotypes.— Cat. No. 43701, U.S.N.M. 



Pachydictya (Rhinidictya) rudis Foerste. See Pachydictya crassa. 



Pachydictya rustica Ulrich. See Pachydictya crassa. 



Pachydictya scitula Ulrich. See Pachydictya crassa. 



Pachydictya? splendens Ulrich. 



Pachydictya splendens Ulrich, Geol. Surv. Illinois, 8, 1890, p. 523, pi. 31, fig. 



2g; pi. 32, figs. 1-lb. 

 Richmond (Fernvale): Wilmington, Illinois. 

 Figured section of cotype. — Cat. No. 43785, U.S.N.M. 



Pachydictya triserialis Ulrich. 



Pachydictya triserialis Ulrich, Jour. Cincinnati Soc. Nat. Hist., 12, 1890, p. 187, 



fig. 12; Geol. Minnesota, 3, 1893, p. 159, pi. 10, figs. 11-14. 

 Trenton: Montreal, Quebec. 

 Cotypes.— Cat. No. 43703, U.S.N.M. 



Pachydictya turgida Foerste. 



Pachydictya turgida Foerste, Bull. Sci. Lab. Denison Univ., 2, 1887, p. 164; 

 ibid., 3, 1888, pi. 15, fig. 11; Geol. Surv. Ohio, 7, 1895, p. 599, pi. 28, fig. 11. 

 Upper Medinan (Brassfield): Dayton and Fair Haven, Ohio. 



PACHTDOMELLA Ulrich. Genotype: P. tumida Ulrich. 



Pachydomella Ulrich, Jour. Cincinnati Soc. Nat. Hist., 13, 1891, pp. 197, 198 — 

 Miller, N. A. Geol. Pal., 1st App., 1892, p. 710. 



Pachydomella Iongula Ulrich and Bassler. 



Pachydomella longula Ulrich and Bassler, Maryland Geol. Surv., Low. Dev., 1913, 



p. 542, pi. 98, figs. 29-31. 

 Hclderbergian (Keyser): Cumberland, Maryland. 

 Holotype.— Cat. No. 53289, U.S.N.M. 



