BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 643 



Homotrypella nodosa Ulrich and Bassler. 



Homotrypella nodosa Hayes and Ulrich, U. S. Geol. Surv. Folio 95, 1903, ill. 



sheet, fig. 14, 15. Ulrich and Bassler, Smiths. Misc. Coll., Quart., 47, 1904, 



p. 21, pi. 7, figs. 1-3. 



Maysville (Leipers): Columbia, Nashville, etc., Tennessee. 

 Cotypes.C&t. No. 43178, U.S.N.M. 



Homotrypella norwoodl Nickles. 



Homotrypella norwoodi Nickles, Bull. Kentucky Geol. Surv., No. 5, 1905, p. 45, 

 pi. 1, fig. 9-11. 

 Trenton (Cynthiana?): Near Pleasant Valley, Nicholas County, Kentucky. 



Homotrypella? ovata Ulrich. 



Homotrypella? ovata Ulrich, Geol. Minnesota, 3, 1893, p. 231, pi. 18, figs. 23-30. 

 Trenton (Prosser): Cannon Falls and Minneapolis, Minnesota. 

 Cotypes.Csit. No. 43562, U.S.N.M. 



Homotrypella rustica Ulrich. 



Homotrypella rustica Ulrich, Geol. Minnesota, 3, 1893, p. 234, pi. 18, figs. 31-33. 

 Monticulipora (Fistulipora) rustica J. F. James, Jour. Cincinnati Soc. Nat. Hist., 



18, 1896, p. 120. 

 Homotrypella cf. rustica Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 



1908, p. 851, pi. 19, figs. 5, 5a; pi. 21, fig. 4; pi. 30, fig. 11. 

 Richmond (Maquoketa): Spring Valley, Minnesota. 

 Figured sections of holotype. Cat. No. 43557, U.S.N.M. 



HOMOTRYPELLA? SUBGRACELIS Ulrich. See Bythopora subgracilis. 

 HORISTOMA Fischer. See Poleumita Clarke and Ruedemann. 

 HORMOCERAS GRACiLE Clarke and Ruedemann. See Actinoceras gracile. 



HORMOCERAS REMOTiSEPTUM Clarke and Ruedemann. See Actinoceras remoti- 

 septum. 



HORMOCERAS TENUIFILUM Clarke and Ruedemann. See Actinoceras tenuifilum. 



HORMOTOMA Salter. 



Genotype: H. salteri Ulrich (=Murchisonia gracilis Salter not Hall). 

 Murchisonia (part) of authors. 



Hormotoma (subgenus of Murchisonia) Salter, Geol. Surv. Canada, Can. Org. Re- 

 mains, dec. 1, 1859, pp. 18, 22. OShlert (subgenus Murchisonia), Extr. Bull. 

 Soc. d'Etud. Sci. d'Angers, 1877, p. 18. Koken, Neues Jahrb. f. Min., Geol. 

 Pal., 6, Beilage-Bd., 1889, p. 368. Donald, Quart. Jour. Geol. Soc. London, 51, 

 1895, p. 211; ibid., 55, 1889, p. 257. Ulrich and Scofield, Geol. Minnesota, 

 3, pt. 2, 1897, pp. 959, 1012. Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. 

 Indiana, 1908, p. 950. Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 

 648. Dall, Zittel-Eastman Textb. Pal., 2d ed., 1913, p. 525. 



Hormotoma? aculeata (Billings). 



Loxonema aculeata Billings, Cat. Sil. Foss. Anticosti, Geol. Surv. Canada, 1866, 



p. 55. 

 Anticostian (Gun River, Jupiter River): Near Chaloupe River, Anticosti. 



Hormotoma? agilis (Billings). 



Murchisonia agilis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 235. 

 Hormotoma? agilis Ulrich, Geol. Minnesota, 3, pt. 2, 1897, p. 1014 (gen. ref.). 

 Canadian (Quebec -G, H): Cape Norman and Table Head, Newfoundland. 



