4 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



ACERVULARI A— Continued. 



(Ai-ch. Mus. Hist. Nat., 5, 1851), pp. 171, 414.~Pictet, Traite de Pal., 2d ed., 

 4, 1857, p. 457.— Hall, Geol. Surv. Iowa, 1, pt. 2, 1858, p. 476.— Milne-Ed- 

 wards, Hist. Nat. d. Corall., 3, 1860, p. 407.— Dybowski, Archiv. f. Natiir. 

 Liv.-Ehst. und Kiirl., 5, 1873, p. 338.— Zittel, Handbuch Pal., 1, 1879, p. 233.— 

 Roemer, Leth. geog., pt. 1, lyCth Pal., 1883, p. 350.— Koch, Paleeontographica, 

 29, 1883, pp. 330, 342.— Miller, N. A. Geol. Pal., 1889, p. 170.— Sherzer, 

 Amer. Geol., 7, 1891, pp. 284-289.— Koken, Die I.eitfossilien, Leipzig, 1896, 

 p. 311, fig. 234.— Lindstrom, Kongl. Sven. Vet.-Akad. Haudl., 32, No. 1, 

 1899, p. 17.— Zittel-Eastman Textb. Pal., 1, 1900, p. 79.— Lambe, Gont. Can. 

 PaJ., Geol. Siu-v. Canada, 4, pt. 2, 1901, p. 163. 



Acerviilaria aiistinl (Salter). 



Strephodes? Austini Salter, Sutherland's Jour. Voyage in BafEns Bay, etc., 2, 



1852, p. ccxxx, pi. 6, figs. 6, 6a. — Etheridge, Quart. Jour. Geol. Soc. 



London, 1878, p. 587.— Woodward, Geol. Mag., dec. 2, 5, 1878, p. 386, pi. 10, 



figs. 1, 2. 

 Clisiophyllum austini? Houghton, Joui-. Geo. Soc. Dublin, 1, 1857, p. 246, pi. 10, 



figs. 2, 2a. 

 Acervularia austini Lambe, The Cruise of the " Neptune," App. 4, 1906, ji. 322; 



Cruise of the "Arctic" in 1908-9, 1910, p. 479. 

 Niagaran: Cornwallis, Beechey and Griffith's Islands, and (ape Hilgard, Arctic 



America. 



Acervularia cllntonensls Nicholson. 



Accrvulai-ia clintonensis Nicholson, Geol. Surv. Ohio, Pal. 2, 1875, p. 227, \A. 



23, figs. 2, 2a.— Miller, N. A. Geol. Pal., 1889, p. 170, fig. 129. 

 Upper Medinan (Brassfield?): Yellow Springs, Ohio. 



Acervularia communis Simpson. See Prismatophyllum inequalis. 



Acervularia gracilis (Billings). 



Strombodes gracilis Billings, Geol. Canada, Geol. Surv. Canada, 1863, p. 306, 



fig. 309; Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 113 (Adv. sheets, 1862).— 



Chamberlin, Geol. Wisconsin, 1, 1883, p. 190, fig. — Lesley, Geol. Sur\-. 



Pennsylvania, Rep. P. 4, 1890, p. 1109, fig. 

 Acervularia gracilis Lambe, Ottawa Nat., 12, 1899, p. 221; Cont. Can. Pal., Geol. 



Surv. Canada, 4, pt. 2, 1901, p. 163, pi. 14, figs. 2, 2a. 

 Upper Medinan (Cataract): Manitouaning, Grand Manitoulin Island, Lake Huron. 



Acervularia inequalis Schuchert. See Prismatophyllum inequale. 



ACHRADOCRINUS Schultze. Genotype: A. ventrosus Schultze. 



Achradocrinus Schultze, Denk. d. Kais. Akad. der Wise., Math.-Naturw. CI. 24, 

 Abth. 2, p. 213, fig. 19.— Zittel, Handb. Pal., 1, 1879, p. 364.— Wachsmuthand 

 Springer, Proc. Acad. Nat. Sci. Philadelphia, 1886, pp. 115, 151. (Rev. Pal., 

 pt. 3, sec. 2, pp. 191, 272.)— Bather, Ann. Mag. Nat. Hist., 6 ser., 5, 1890, p. 

 324, pi. 14, fig. 22; Treatise on Zool., pt. 3, Echinoderma, 1900, p. 178, fig. 95.— 

 Slocom, Field Columbian Mus., 2, 1908, p. 287.— Zittel, Handb. Pal., 1, 1910, 

 p. 152. 



Achradocrinus patulus Slocom. 



Achradocrinus patulus Slocom, Field Columbian Mus., 2, 1908, p. 288, pi. 85, 



figs. 1-4. 

 Niagaran (Racine): Romeo, Illinois. 



