Linne, K.

1759.--Petrificatet entomolithus paradoxus sdant, som det finnes uti Hans Excellence Riks. Rdets Hogoalborne Herr Grefve C. G.

Tessins Samling. K. svenska Vet.-Akad. Handl., vol. 20, pp. 21, 22, pl. 1, fig. 1.

Matthew, W. D.

1893.--On antennae and other appendages of _Triarthrus becki_. Amer.

Jour. Sci. (3), vol. 46, pp. 121-125, pl. 1; Trans. New York Acad. Sci., vol. 12, pp. 237-241, pl. a.

McCoy, F.

1846.--A synopsis of the Silurian fossils of Ireland, p. 42.

Mickleborough, J.

1883.--Locomotory appendages of trilobites. Jour. Cincinnati Soc. Nat.

Hist., vol. 6, pp. 200-204; Geol. Mag., dec. 3, vol. 1, 1884, pp. 80-84; Amer. Jour. Sci. (3), vol. 27, 1884, p. 409. Reviewed by Dames, Neues Jahrb. f. Min., Geol., u. Pal., Bd. 1, 1885, p. 477.

Miller, S. A.

1880.--Silurian ichnolites, with definitions of new genera and species. Jour. Cincinnati Soc. Nat. Hist, vol. 2, pp. 217-218, fig.

Milne-Edwards, H.

1881.--Compte rendu des nouvelles recherches de M. Walcott relatives a la structure des trilobites, suivi de quelques considerations sur l'interpretation des faits ainsi constates. Ann. Sci. Nat, Zoologie, ser. 6, vol. 12, pp. 1-33, pls. 10-12. Paris.

Moberg, J. C.

1902.--Bidrag till Kannedomen om trilobiternas byggnad. Geol. Foren Forhandl., Bd. 24, pp. 295-302; pl. 3, text fig. 1.

1907.--Om ett gatfultt fossil fran sveriges olenidskiffer samt en kort ofversigt af viktigase data rorande trilobiternas ventrala skelettdelar. Ibid., Bd. 29, Heft 5, pp. 265-272, pl. 4, fig. 2; pl. 5, fig. 1.

Oehlert, D. P.

1896.--Resume des derniers travaux sur l'organisation et le developpement des trilobites. Bull. Soc. Geol. France, ser. 3, vol. 24, pp. 97-116, text figs. 1-34.

Packard, A. H.

1872.--On the development of _Limulus polyphemus_. Mem. Boston Soc.

Nat. Hist., vol. 2, pp. 155-202, pls. 3-5.

1880.--The structure of the eye of trilobites. Amer. Nat., vol. 14, pp. 503-508.

1882.--On the h.o.m.ologies of the crustacean limb. Ibid., vol. 16, pp. 785-799, figs. 11, 12.

Pander, C.

1830.--Beitrage zur Geognosie des russischen Reiches. St. Petersburg.

Peach, B. N.

1882.--On some fossil myriopods from the Lower Old Red Sandstone of Forfarshire. Proc. Roy. Physical Soc., Edinburgh, vol. 7, pp. 177-187, pl. 2.

1899.--O some new myriopods from the Palaeozoic rocks of Scotland.

Ibid., vol. 14, pp. 113-126, pl. 4.

Quenstedt, A.

1837.--Beitrag zur Kenntniss der Trilobiten, mit besonderer Rucksicht auf ihre bestimmte Gliederzahl. Archiv f. Naturg., Berlin, 3.

Jahrg., 1 Bd., pp. 337-352.

Raymond, P. E.

1910.--On two new trilobites from the Chazy near Ottawa, Ontario.

Ottawa Nat., vol. 24, pp. 129-134, pl. 2.

1917.--Beecher's cla.s.sification of trilobites, after twenty years.

Amer. Jour. Sci. (4), vol. 43, pp. 196-210, text figs. 1-3.

Raymond, P. E., and Barton, D. C.

1913.--A revision of the American species of _Ceraurus_. Bull. Mus.

Comp. Zool., vol. 54, pp. 525-543. pls. 1, 2, 3 text figs. 1-3.

Reed, F. R. C.

1916.--The genus _Trinucleus_. Pt. 4. Geol. Mag., dec. 6, vol. 3, pp. 121, 122.

Richter, R.

1848.--Bitrag zur Palaeeontologie des Thuringer Waldes. Dresden and Leipzig.