112 BULLETIN S2, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Aroh. Naturg., 1800, vol. 1, p. 92.— W. B. Carpenter, Phil. Trans. Roy. Sec, vol. 156, 1866, pp. 

 072, 673, 675, 678, 680, 682, 686 (detailed historical account).— Lo yen, Ofvers. K. VetenskAkad. 

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 1868, 1869, p. Iv; Amer. Journ. Sci., ser. 2, vol. 48, 1869, p. 429.— LOtken, Canadian Nat., new 

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 PouRTALES, Bull. Mus. Comp. Zool., vol. 1, No. 11, 1869, p. 355.— M. Sars, Forh. Skand. 

 naturf. Mjide, Christiauia, 1868, 1869, p. liii; Ann. Mag. Nat. Hist., ser. 4, vol. 3, No. 14, 1869, 

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 Carpenter, Trans. Roy. Micr. Soc, vol. 3, 1870, p. 228. — Billings, Amer. Journ. Sci., ser. 

 2, vol. 50, 1870, pp. 234, 237; Canadian Nat., new ser., vol. 5, 1870, p. 181; Ann. Mag. Nat. 

 Hist., ser. 4, vol. 7, 1871, p. 143. — Wyville Thomson, Proc. Roy. Soc. Edinburgh, vol. 7, 1871, 

 pp. 415-418; Proc. Roy. Soc. Edinburgh, vol. 7, 1872, p. 764. — Geinitz, Palaeontographica, 

 vol. 20, 1872, No. 2, p. 18. — Gegenbaur, Grundriss der vergleichenden Anatomie, Leipzig, 

 1874, p. 290.— P. H. Carpenter, Journ. Anat. Physiol., vol. 10, 1876, pp. 571, 576; vol. 11, 

 p. 89.— W. B. Carpenter, Proc. Roy. Soc, vol. 24, 1876, pp. 211-231. — Claus, Grundziige 

 der Zoologie, 1876, pp. 274, 277, 279.— Greeff, Sitz. Ges. Nat. Marburg, 1876, No. 5, 

 p. 88. — LnowiG, Nachr. Ges. Gottingen, 1S76, No. 23, p. 679. — Zittel, Handbuch der Palaeon- 

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1877, p. 49. — Moseley, Quart. Journ. Micr. Sci., new ser., vol. 17, 1877, pp. 8, 10. — Pascoe, 

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 12, 1877, p. 38; Journ. Linn. Soc. (Zool.), vol. 13, 1877, p. 439; Nature, vol. 15, 1877, p. 197; 

 Quart. Journ. Micr. Sci., new ser., vol. 18, 1878, p. 352. — von Marenzeller, Denkschr. 

 Akad. Wiss. Wien, vol. 35, for 1877, 1878, p. 380.— Pourtales, Bull. Mus. Comp. Zool., vol. 5, 



1878, p. 214. — ScHLUTER, Zeitschr. dcutsch. geol. Ges., vol. 30, pt. 1, 1878, p. 40.^P. H. 

 Carpenter, Trans. Linn. Soc. (Zool.), ser. 2, vol. 2, 1879, pp. 3, 19, 20, 23, 29, 31 (history); 

 Nature, vol. 19, 1879, p. 450; Proc. Roy. Soc, vol. 28, 1879, p. 385; Quart. Journ. Micr. Sci., 

 new ser., vol. 19, 1879, p. 181. — Fontannes, Ann. Soc. Agiic Hist. Nat., Lj-on, 1879, p. 50. — 

 DE Loriol, Monographic des ciinoides fossiles de la Suisse, 1879, p. 253. — Ludwig, Mitt. Zool. 

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 Palaeozoologie, vol. 1, Abt. 2, 1879, p. 395. — Claus, Grundziige der Zoologie, ed. 4, vol. 1, 1880, 

 p. 335.— Ludwig, Zeitschr. wiss. Zool., vol. 34, 1880, p. 313.— P. H. Carpenter, Journ. Linn. 

 Soc. (Zool.), vol. 15, 1880, p. 189; Pop. Sci. Rev., new ser., vol. 4, No. 15, 1880, p. 194, pis. 5, 6; 

 Quart. Journ. Geol. Soc, vol. 36, 1880, pp. 40, 45; Quart. Journ. Micr. Sci., new ser., vol. 20, 



1880, p. 322; Bull. Mus. Comp. Zool., vol. 9, No. 4, 1881, pp. 152, 153, 161-163; Notes Leyden 

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 Echjnodermata of the Arctic Seas to the west of Greenland, 1881, p. 73.— Neumayr, Sitz. Akad. 

 Wiss. Berlin, 1881, Abt. 1, pp. 167, 168.— Pagenstecher, Allgemeine Zoologie, pt. 4, Berlin, 



1881, p. 16.— Wachsmuth and Springer, Proc. Acad. Nat. Sci. Philadelphia, 1881, p. 212 (38 

 of separate).— Bell, Proc. Zool. Soc. London, 1882, p. 530.— Lutken, Dyreriget, 1882, pp. 616, 

 617.— P. H. Carpenter, Bull. Mus. Comp. Zool., vol. 10, No. 4, 1882, pp. 166, 179 (13, 26 of 

 separate); Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 501; Quart. .Tourn. Micr. Sci., vol. 22, 1882, 

 p. 373; Proc Zool. Soc. London, for 1882, 1883, p. 732; Quart. Journ. Micr. Sci., new ser., vol. 

 23, 1883, p. 610.— Chapman, Trans. Roy. Soc. Canada, vol. 1, for 1882, 1883, Sect. 4, p. 115. — 

 Perrier, Compt. Rend. Acad. Sci., vol. 96, No. 11, 1883, p. 725.— Bell, Rep. Zool. Coll. 

 H.M.S. Alcrl, 1884, p. 155.— P. H. Carpenter, Phil. Trans. Roy. Soc, vol. 174, for 1883, 1884, 

 p. 926; Proc. Roy. Soc. Edinburgh, vol. 12, 1884, p. 360; Quart. Journ. Micr. Sci., new ser., 

 vol. 24, 1884, p. 324; Challenger Reports, Zoology, vol. 11, pt. 32, 1884, p. 137.— W. B. Car- 

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 1884, p. 84.— Claus, Traitd de Zoologie, vol. 4, 1884, p. 412.— LoCkinoton, Standard natural 

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