608 ARTHROPODA SUB-KINGDOM VII 
cephalon, thorax, and abdomen distinct. Cephalon covered with a shield composed of 
a primitively pentamerous middle piece, the cranidium, and two side pieces, or free 
Centre de la Bohéme. Part I. 1852; Supplement, 1872. — Angelin, N. P., Palaeontologia 
Scandinavica. Part 1. Crustacea formationis transitionis. 1854.—Nieszkowski, J., Versuch einer 
Monographie der in den silurischen Schichten der Ostseeprovinzen vorkommenden Trilobiten. 
1857.—Hofimann, E., Simmtliche bis jetzt bekannte Trilobiten Russlands. (Verhandl. Mineral. 
Gesellsch. St. Petersburg), 1857-58.—Salter, J. W., A Monograph of British Trilobites (Palaeonto- 
graphical Society), 1864.—Jdem and Woodward, H., ibid. 1867-84.—Schmidt, F., Revision der 
ostbaltischen silurischen Trilobiten (Mém. Acad. Imp. St. Petersburg, vol. XXX., No. 1), 1882.— 
Brégger, W. C., Die silurischen Etagen 2 und 3 in Kristianagebiet und auf Eker. 1882.—Holm, 
G., De Svenske Arterna af Trilobitsligtet Illaenus (Bihang till K. Svensk. Vetensk. Akad. Handl., 
vol. VIL, No. 3), 1882.—Matthew, G. F., Illustrations of the Fauna of the St. John’s Group. 
1882-93.— Woodward, H., Monograph of the British Carboniferous Trilobites (Palaeontographical 
Society), 1883.—Hall, J., and Clarke, J. M., Palaeontology of New York, vol. VII., 1888.— Walcott, 
( D., The Fauna of the Lower Cambrian or Olenellus Zone (10th Ann. Rept. U.S. Geol. Survey), 1890. 
B. Structure and Appendages. 
Burmeister, H., Vide ante, 1843.—Billinys, E., Notes on some Specimens of Lower Silurian 
Trilobites (Quar. Journ. Geol. Soc., vol. XXVI.), 1870.— Woodward, H., Note on the Palpus and 
other Appendages of Asaphus from the Trenton Limestone in the British Museum (Quar. Journ, 
Geol. Soc., vol. XXVI.), 1870.— Walcott, C. D., Preliminary Notice of the Discovery of the Natatory 
and Branchial Appendages of Trilobites (28th Rept. N.Y. State Mus. Nat. Hist.), 1875.—The 
Trilobite ; New and Old Evidence relating to its Organization (Bull. Mus. Comp. Zoology, vol. 
VIII), 1881.—Novdk, O., Studien an Hypostomen bohmischen Trilobiten (Sitzungsber. bohm. 
Geselssch. Wissensch.), Jahrg. 1879, 1886.—Clarke, J. M., The Structure and Development of the 
Visual Area in the Trilobite Phacops rana Green (Journ. Morphology, vol. I.), 1888.—Matthew, 
W. D., On Antennae and other Appendages of Triarthrus beckii (Amer. Journ. Sci. [3], vol. XLVL.), 
1893.—Beecher, C. E., On the Thoracic Legs of Triarthrus (Amer. Journ. Sci. [3], vol. XLVI), 
1893.—On the Mode of Occurrence, and the Structure and Development of Triarthrus becki 
(American Geologist, vol. XIII.), 1894.—The Appendages of the Pygidium of Triarthrus (Amer. 
Journ. Sci. [3], vol. XLVII.), 1894.—Further Observations on the Ventral Structure of Triarthrus 
(Amer. Geologist, vol. XV.), 1895.—The Morphology of Triarthrus (Amer. Journ. Sci. [4], vol. L), 
1896.—Structure and Appendages of Trinucleus, ibid. 1895. 
C. Ontogeny. 
Barrande, J., Vide ante, 1852.—Beecher, C. E., The Larval Stages of Trilobites (Amer. 
Geologist, vol. XVI.), 1895.—Matthew, G. F., Sur le developpment des premiers Trilobites (Ann. 
Soc. Roy. Mal. de Belgique, vol. XXIII.), 1889.—Vide ante, 1882-93. 
D. Systematic Position. 
Zittel, K. A., Handbuch der Palaeontologie, Bd. II., 1881-85.—Grundziige der Palaeontologie, 
1895.—Lang, A., Text-book of Comparative Anatomy. English Translation by H. M. and M. 
Bernard. 1891.—Kingsley, J. S., The Classification of the Arthropoda (Amer. Naturalist, vol. 
XXVIII), 1894.—Bernard, H. M., The Systematic Position of the Trilobites (Quar. Journ. Geol. 
Soe., vols.*L., LI.), 1894-95.—The Zoological Position of the Trilobites (Science Progress, vol. IV.), 
1895.—Woodward, H., Some Points in the Life-History of the Crustacea in Early Palaeozoic Times 
(Quar. Journ. Geol. Soec., vol. LL.), 1895.—Haeckel, E., Systematische Phylogenie der wirbellosen 
Thiere (Invertebrata), 1896.—Beecher, C. #., Outline of a Natural Classification of the Trilobites 
(Amer. Journ. Sci. [4], vol. IIL), 1897.—Pompeckj, J. F., Ueber Calymmene, Brongniart (Neues 
Jahrb., Bd. I.), 1898. 
E. Classification. 
Barrande, J., Vide ante, 1852.—Beecher, C. E., ante, 1897.—Brongniart, A., ante, 1822.—Bur- 
meister, H., ante, 1843.—Corda, A. J. C., and Havwle, J., ante, 1847.—Haeckel, E., ante, 1896.— 
Dalman, J. W., Om Palaeaderna eller de s& kallade Trilobiterna. Stockholm, 1826.—Milne- 
Edwards, H., Histoire naturelle des Crustacés, 1834-40.—Quenstedt, F. A., Beitrige zur Kennt- 
niss der Trilobiten (Wiegmann’s Archiv. fiir Naturgesch., vol. III.), 1887.—Hmmrich, H. F., De 
Trilobitis. Dissertation. 1839.—Zur Naturgeschichte der Trilobiten, 1844.—Goldfuss, A., Systema- 
tische Ueberschicht der Trilobiten und Beschreibung einiger neuen Arten derselben (Neues Jahrb. 
fiir Mineral.), 1843.—M‘Coy, F., On the Classification of some British Fossil Crustacea, with 
Notices of new Forms in the University Collection at Cambridge (Ann. Mag. Nat. Hist. [2], vol. 
IV.), 1849.—Chapman, E. J., Some Remarks on the Classification of the Trilobites as influenced 
by Stratigraphic Relations: with Outlines of a new Grouping of these Forms (Trans. Roy, Soe. 
Canada, vol. VII.), 1889.—Reed, F. R. C., Notes on the Evolution of the Genus Cheirurus (Geol. 
Mag. [4], vol. IV.), 1896.—Blind Trilobites (bid. vol. V.), 1898. 
F. Bibliography. 
Vogdes, A. W., A Classed and Annotated Bibliography of the Palaeozoic Crustacea (Cal. Acad, 
Sci. Occas. Papers, IV.), 1893. Supplement in Proc. Cal. Acad. vol. V., 1895. See also references 
under Crustacea. 


