16 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



ACTINOCRINUS SPECIOSUS Meek and Worthen. See Feriechocrinus speciosus. 

 ACTINOCRINUS SUBCRASSUS Meek and Worthen. See locrinus snbcrassus. 

 ACTINOCRINUS TENUIRADIATUS Hall. See Palseocystites tenuiradiatus. 

 ACTINOCRINUS \VALDRONENSIS Shumard. See Periechocrinus whitfieldi. 

 ACTINOCRIXUS WHITFIELDI Shumard. See Periechocrinus whitfieldi. 



ACTINODICTYON Parks. Genotype: A. canadense Parks. 



Actinodictyon Parks, Univ. Toronto Studies, Geol. Ser., No. 6, 1909, p. 30. 



Actinodictyon canadense Parks. 



Actinodictyon canadense Parks, Univ. Toronto Studies, Geol. Ser. No. 0, 1909, 



p. 32, pi. 20, figs. 1, 2. 

 Niagaran: Southampton Island, Hudson Bay, Canada. 



Actinodictyon keelei Parks. 



Actinodictyon keelei Parks, Univ. Toronto Studies, Geol. Ser. No. 5, 1909, p. 



35, pi. 19, figs. 5, 6. 

 Niagaran: Gravel River, Mackenzie District, Canada. 



Actinodictyon lowi Parks. 



Actinodictyon lowi Parks, Univ. Toronto Studies, Geol. Ser. No. 6, 1909, p. 33, 



pi. 20, figs. 3, 4. 

 Niagaran: Southampton Island, Hudson Bay, Canada. 



Actinodictyon neptuni Parks. 



Actinodictyon neptuni Parks, Univ. Toronto Studies, Geol. Ser. No. 6, 1909, p. 



34, pi. 20, figs. 5, 6. 

 Niagaran: Southampton Island, Hudson Bay, Canada. 



ACTINODONTA Phillips. See Lyrodesma Conrad. 

 ACTINOMYA Ulrich. See Whiteavesia Ulrich. 



ACTINOPTERIA Hall. Genotype: A. decussata Hall. 



Actinopteria Hall, Pal. New York, 5, pt. 1, Lam. (adv. copy), 1883, p. 3; ibid., 

 1884, p. xii; 35th Rep. New York State Mus. Nat. Hist., 1884, p. 406b; 1st 

 Rep. State Geol. New York, 1884, p. 13. Miller, N. A. Geol. Pal., 1889, p. 

 459. Nettelroth, Kentucky, Foss. Shells, Geol. Surv. Kentucky, 1889, p. 

 229. Jackson, Mem. Boston Soc. Nat. Hist., 4, 1890, p. 386. Whidborne, 

 Mon. Bev. Fauna South England, 2, Pal. Soc., 1892, p. 59. Grabau, Bull. 

 Buffalo Soc. Nat. Sci., 6, 1899, p. 245. Clarke, Archiv. Mus. Nac. de Janeiro, 

 10, author's Eng. ed., 1900, p. 45. Hind, Mon. British Carb. Laniell., 2, 

 Pal. Soc., 1901, p. 22. 



Actinopteria bella Williams. 



Actinopteria bella Williams, Proc. U. S. Nat. Mus., 45, 1913, p. 342, pi. 30, figs. 



17, 19. 



Silurian (Pembroke): Leighton Cove, Washington County, Maine. 

 Cotypes.Czt. No. 58964, U.S.N.M. 



Actinopteria communis (Hall). 



Avicula communis Hall, Pal. New York, 3, 1859, p. 286, pi. 3, figs. 1-7; pi. 53, 

 figs. 1, 4, 6. 



Actinopteria communis Clarke, Mem. New York State Mus., 3, No. 3, 1900, p. 

 34, pi. 4, figs. 1, 2. Weller, Pal. New Jersey, 3, 1903, p. 292, pi. 31, fig. 21. 

 Ohern, Maryland Geol. Surv., Low. Dev., 1913, p. 455, pi. 76, figs. 2-4. 



Helderbergian: Helderberg Mountains, etc., New York; New Jersey; Cumber- 

 land, Maryland (Keyser, etc.). 



