NicKLEs AND BAssLER.] CATALOGUE OF GENP:KA AND SPECIES. 291 



HEXAGONELLA Waiiycn and Wontzel. Genotype: Hexag-onella 

 ranio.sa ^^ aagen and Wcntzel. 



1886. Hexagonella. Waagen and Wentzel, Pal. Indica, Ser. XIII, pp. 909, 911. 

 Obs. — This genus is known in America l)y two undescribed species, one 



from tlie Hamilton at the Falls of the Ohio, the other from the AV^ansaw 

 at C'larksville, Tennessee. 



Hippothoa Lamoiiroux. Not a Paleozoic genus. 



Hippotboa delieatula James. See Stoniatopora delicatula (James), 



Hippothoa inflata Nicholson. See Stoniatopora inflata (Hall). 



HOMOTRYPA Ulrich. Genotype: Homotrypa curvata Ulrich. 



1882. Homotrypa. Ulrich, Jour. Cincinnati Soc. Nat. Hist., V, p. 240. 



1883. Homotrypa. Foord, Contr. ]Micro-Pal. Cambro-Sil., p. 9. 



1889. Homotrypa. Miller, North American Geol. Pal., p. 309. 



1890. Homotrypa. Ulrich, Geol. Snr. Illinois, VIII, pp. 370, 409. 



1893. Homotrypa. Ulrich, Geol. Minnesota, III, p. 235. 



1896. Homotrypa. Ulrich, Zittel's Textb. Pal., (Engl. ed. ), p. 273. 



1897. Homotrypa. Simpson, Fourteenth Ann. Rep. State Geologist New York 



for the year 1894, p. 575. 



Homotrypa ? arbuscula Ulrich. 



1890. Homotrypa arbuscula. Ulrich, Geol. Sur. Illinois, VIII, p. 409, p]. xxxviii, 

 3-3c. 



1894. Homotrypa arbuscula. Keyes, Missouri Geol. Sur., V, p. 13. 



Trenton (Stones Eiver): High Bridge, Kentucky; Calhoun County and 

 Dixon, Illinois. 



Homotrypa callosa Ulrich. 



1893. Homotrypa callo.'^a. Ulrich, Geol. Minnesota, III, p. 243, pi. xx, 15-21. 

 1897. Homotrypa callosa. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, figs. 1.39, 140 (p. 576). 

 Trenton: Burgin, Frankfort, and Garrard County, Kentucky; C!annon Falls, 

 Minnesota. 



Homotrypa ? confluens (Foerste). 



1887. Monotrypella confluen.s. Foerste, Bull. Sci. Lab. Denison Univ., II, p. 172; 



ibid. , III, 1888, pi. xvi, 4. 



1895. Homotrypa confliueus. Foerste, Geol. Sur. Ohio, A^II, p. 600. 

 Clinton: Dayton, Ohio. 



Homotrypa curvata Ulrich. 



1882. lIomotryj)a curvata. Ulrich, Jour. Cincinnati Soc. Nat. Hist., Y, p. 242, pi. 



x, 1-7 d. 

 1895. Monticulipora curvata. J. F. James, Jour. Cincinnati Soc. Nat. Hi.st., 



XYIII,p.71. 

 1897. Homotrypa curvata. Simpson, Fourteenth Ann. Rep. State Geologist New 

 York for the year 1894, figs. 137, 138 (p. 576). 

 Cincinnati (Lorraine): Cincinnati, Ohio, and vicinity. 



Homotrypa dawsoni (Nicholson). 



1881. Monticulipora (Heterotrypa) Dawsoni. Nicholson, Genus Monticulipora, 



p. 141, pi. v, :3-;3/. 



1882. Monticulipora dawsoni. Ulrich, Jour. Cincinnati Soc. Nat. Hist., \, p. 241 . 



1888. Monticulii)ora dawsoni. James and James, Jour. Cincinnati Soc. Nat. 



Hist., XI, p. 15. 



