16 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



AcTiNocRiNus spEciosus Meek and Worthen. See Periechocrinus speciosus. 



AcTiNocRiNus suBCRASsus Meek and Worthen. See locrinus snbcrassus. 



AcTiNocRiNus TENuiRADiATus Hall. See Palseocystites tenuiradiatus. 



ACTINOCRINUS WALDRONENSis Shumatd. See Periechocrinus whitfieldi. 



ACTINOCRINUS WHiTFiELDi Shiimard. See Periechocrinus whltfieldi. 



ACTINODICTYON Parky. Genotype: A. canadense Parks. 



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



Actlnodictyon canadense Parks. 



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



p. 32, pi. 20, tigs. 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 lowl Parks. 



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



pi. 20, figs. 3, 4. 

 Niagaran: Southampton Island, Hudson ]>ay, Canada. 



Actinodictyon neptuni Parks. 



Actinodictyon neptuni Parks, Uni\'. Toronto Studies, Geol. Ser. No. (i, 1909, p. 



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

 Niagaran: Southampton Island, Hudson Bay, Canada. 



AcTiNODONT.v Phillips. See Lyrodcsnia Conrad. 



AcTiNOMYA ULrich. See "WTiiteavesia 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. Sui-v. Kentucky, 1889, p. 

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

 Mon. Dev. 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. Lamell., 2, 

 Pal. Soc, 1901, p. 22. 



Actinopteria bella Williams. 



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



17, 19. 

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

 Cotypes.—Ca.t. 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.). 



