BIBLIOGRAPHIC LIST OF GENERA AND SPECIES. 659 



Ichthyocrinus subaugularis Continued. 



11 (2), figs. 15, 16; p. 385, fig. 11; p. 391; rev. ed., 1870, p. 367, pi. 11, figs. 15, 

 16; p. 429, text fig; 28th Rep. New York State Mus. Nat. Hist., doc. ed., 1875, 

 1877, pi. 16, figs. 11-13; mus. ed., 1879, p. 137, pi. 16, figs. 11-13; llth Ann. 

 Rep. Indiana Dep. Geol. Nat. Hist., 1882, p. 268, pi. 15, figs. 12, 13; pi. 16, 

 figs. 11-13. Weller, Bull. Chicago Acad. Sci., Nat. Hist. Surv., 4, pt. 1, p. 146, 

 pi. 15, figs. 3-5. Springer, Jour. Geol., 14, 1906, p. 477, pi. 6, fig. 2; Mon. 

 Crin. Flex., Smith. Inst. (in press). 

 Niagaran: Waldron, Indiana (Waldron); Bridgeport and Romeo, Illinois (Racine). 



IDIOCRINUS Wachsmuth and Springer. See Gazacrinus Miller. 



IDIOCRINUS ELONGATUS Wachsmuth and Springer. See Gazacrinus inornatus. 



IDIOCRINUS TENNESSEENSIS Wachsmuth and Springer. See Ormocrinus tennesseensia. 



IDIOSTROMA Winchell. Genotype: I. csespitosum Winchell. 



Idiostroma Winchell, Proc. Amer. Assoc. Adv. Sci., 15, 1867, p. 99. 

 Nicholson, Mon. British Strom., Pal. Soc., 1886, pp. 10, 11, 99. 



Idiostroma nattressi Grabau. 



Idiostroma nattressi Grabau, Michigan Geol. Surv., Geol., 1st ser., 1909, p. 94, 



pi. 9, figs. 5-7; pi. 8, figs. 2, 3. 

 Upper Monroan (Anderdon and Amherstburg) : Near Amherstburg, Ontario. 



IDIOTRTPA Ulrich. Genotype: Idiotrypa parasitica Ulrich. 



Idiotrypa Ulrich, Jour. Cincinnati Soc. Nat. Hist., 6, 1883, p. 272. Miller, N. A. 

 Geol. Pal., 1889, p. 310. Ulrich, Geol. Surv. Illinois, 8, 1890, p. 375. 

 Simpson, 14th Ann. Rep. State Geol. New York for 1894, 1897, p. 591. 

 Nickles and Bassler, Bull. U. S. Geol. Surv., 173, 1900, p. 34. Bassler, ibid., 

 292, 1906, p. 39. 



IDIOTRYPA PARASITICA Ulrich. See Idiotrypa punctata. 



Idiotrypa punctata (Hall). 



Trematopora?? punctata Hall, Pal. New York, 2, 1852, p. 151, pi. 40A, figs. 4a-c. 

 Idiotrypa punctata Bassler, Bull. U. S. Geol. Surv., 292, 1906, p. 40, pi. 17, figs. 



4-10; pi. 24, figs. 17-19. 

 Idiotrypa parasitica Ulrich, Jour. Cincinnati Soc. Nat. Hist., 6, 1883, p. 273, 



pi. 13, figs. 1-lc. Simpson, 14th Ann. Rep. State Geol. New York for 1894, 



1897, figs. 187-189 (p. 591). 

 Clinton: Rochester, Lockport, etc., New York (Rochester); Osgood, Indiana 



Plesiotypes Cat. Nos. 35496, 43674, U.S.N.M. (Holotype of I. parasitica). 



ILIONIA Billings. Genotype: I. canadensis Billings. 



Ilionia Billings, Canadian Nat., n. s., 7, 1874, p. 301. Whiteaves, Pal. Foss., Geol. 

 Surv. Canada, 3, pt. 1, 1884, p. 13. Miller, N. A. Geol. Pal., 1889, p. 483. 

 Grabau and Shimer, N. A. Index Fossils, 1, 1909, p. 379. 



Ilionia canadensis Billings. 



Ilionia Canadensis Billings, Canadian Nat., n. s., 7, 1874, p. 301, fig. 1, 2. 

 Whiteaves, Pal. Foss., Geol. Surv. Canada, 3, pt. 1, 1884, p. 13, fig. 3; p. 14, 

 fig. 4; ibid., pt. 2, 1905, p. 67. 



Silurian: Port Daniel, Bay of Chaleurs, Quebec; Elora and Hespeler, Ontario 

 (Guelph). 



