470 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



ECHINOCYSTTTES Hall. See Lysocystites Miller. 

 EcmNOENCRiNTTES ANATTFORMis Hall. See CMrocrinus anatiformis. 

 ECHINOENCRINITES FENESTRATUS Troost. See Tetracystis fenestratus. 



ECHINOGNATHUS Walcott. Genotype: Eurypterus? Cleveland! Walcott. 



Echinognathus Walcott, Amer. Jour. Sci., 3d ser., 23, 1882, p. 213. Zittel, Handb. 

 Pal., 2, 1885, p. 651. Miller, N. A. Geol. Pal., 1889, p. 546. Vogdes, Annals 

 New York Acad. Sci., 5, 1889, p. 18. Clarke, Zittel-Eastman Textb. Pal., 1, 

 1900, p. 676; 2d ed., 1913, p. 783. Clarke and Ruedemann, Mem. New York 

 State Mus., 14, 1912, p. 321. 



Echinorhynchus (in error for Echinognathus) Martin, Trans. New York Acad. 

 Sci., 2, 1882, p. 8. 



Echinognathus cleyelandi (Walcott). 



Eurypterus? clevelandi Walcott, Amer. Jour. Sci., 3d ser., 23, 1882, p. 153, 



figs. 1, 2. 

 Eurypterus (Echinognathus) clevelandi Laurie, Trans. Royal Soc. Edinburgh, 



39, 1899, p. 587. 

 Echinognathus clevelandi Walcott, Amer. Jour. Sci., 3d ser., 23, 1882, p. 213, 



figs. 1, 2. Clarke and Ruedemann, Mem. New York State Mus., 14, 1912, p. 



322, pi. 58, figs. 1, 2. 



Utica: Holland Patent, Oneida County, New York. 

 Cotypes.C&t. No. 26785, U.S.N.M. 



ECHINORHYNCHUS Martin. See Echinognathus Walcott. 

 ECHINOSPHJERA Angelin. See Echinosphserites Eichwald. 



ECHINOSPELERITES W T ahlanberg. Genotype: Echinus aurantium Gyllenhal. 



Echinosphserites Wahlenberg, Acta Soc. Sci. Upsala, 8, 1821, p. 52. Eichwald, 

 Zool. Specialis, pt. 1, Vilnae, 1829, p. 231. Muller, Ann. Mag. Nat. Hist., 

 2d ser., 13, 1854, p. 248. Chapman, Canadian Jour., new ser., 2, 1857, p. 

 303. Pictet, Traite de Pal., 2d ed., 4, 1857, p. 302. Hall, Pal. New York, 3, 

 for 1859, 1861, p. 150. Zittel, Handb. Pal., 1, 1879, p. 417. Barrande and 

 Waagen, Syst. Sil. Centre Boheme, 7, pt. 1, 1887, p. 150, pis. 16, 21-25, 39. 

 Jaekel, Stammes. Pelmat., 1, Thecoideau. Cyst., Berlin, 1899, p. 331. Zittel- 

 Eastman Textb. Pal., 1, 1900, p. 183. 



Echinosphsera Angelin, Icon. Criniod., 1878, p. 28. Haeckel, Amph. Cyst. 

 Leipzig, 1896, p. 66, pi. 1, figs. 3-3E. Bather, Treatise on Zool., pt. 3, Echin- 

 oderma, London, 1900, p. 53, figs. 14, 15. Springer, Zittel-Eastman Textb. 

 Pal., 2d ed., 1913, p. 152. 



Echinosphserites aurantium (Gyllenhal). 



Echinus aurantium Gyllenhal, Kong. Vet. Akad. Hand., 33, 1772, p. 245, pi. 8, 



figs. 4, 5; pi. 9, figs. 6-9. Wahlenberg, Jour, de Physique, 91, 1820, p. 188. 

 Echinosphaerites aurantium Wahlenberg, Acta Soc. Sci. Upsala, 8, 1821, p. 52. 



Bassler, Bull. Virginia Geol. Surv., 2a, 1909, pi. 3, fig. 19; pi. 21, figs. 6-8. 

 Sphaeronites aurantium Hisinger, Anteckninger, 4, 1828, pp. 195, 198. 

 Echinosphsera aurantium Angelin, Iconog. Grin. Soc., 1878, p. 28, pi. 14, figs. 1-2] 

 Crystallocystis aurantium Haeckel, Die Amph. und Cyst., 1896, p. 66, pi. 1, 



3-3e. 

 Middle Ordovician: Esthonia, Russia; Pennsylvania, Maryland, and 



(Chambersburg); Virginia and Tennessee (Ottosee); Tennessee (Cart 



Missouri, etc. (Kimmswick). 

 Plesiotypes. Cat. No. 56631, U.S.N.M. 



