8 Arthropoda I. MARIE DAIBBR, Trilobita. 



1893. Matthew, IV., On antennae and other appendages of Triarthrus beckii. Ibid. 



1894. Heeclier, C., The appendages of the pyyidium of Triarthrus. Ibid., Vol. 47. 



1894. Bernard, H., The systematic position of the Trilobites. Quart. Journ. Geol. Soc.. 



Vol. 50. 



1895. Beecher, C., The larval stages of Trilobites. Amur. Geol., Vol. 16. 



1895. Bernard, H., Notes on the systematic position of the Trilobites. Quart. Journ. 

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1895. The zoological position of the Trilobites. Sc. Progress, Vol. 4- 



1896. Beecher, C., The morphology of Triarthrus. Amer. Journ. Sc., (4) Vol. 1. 



1897. - - Outline of a natural classification of the Trilobites. Amer. Journ. Sc., (4) Vol. ',. 



1897. Kingsley, J"., The systematic position of the Trilobites. Amer. Geol., Vol. 20. 



1898. Cowper Reed, F., Blind Trilobites. Geol. Mag., (4) Vol. 5. 



1898 1901. Schmidt, F.. Revision der ostbaltischen silurischen Trilobiten, I u. II. 



Mem. Ac. Sc. St. Peter sbourg, (8) T. 6 n. 12. 

 1901. Jacket, O., Beitrage zur Beurteilung der Trilobiten. Zeitschr. Deutsch. Geol. Ges., 



Bd. 53. 



1901. Lindstrom, G., Researches on the visual organs of the Trilobites. K. Svensk. 

 Vetensk. Ak. Handl., Vol. 84. 



1902. Beecher, C., The ventral integument of Trilobites. Amer. Journ. Sc'., (4) Vol. 13. 



1902. Jaekel, O., Bemcrkungen iiber den Beinbau der Trilobiten. Zeitschr. Deutsch. 

 Geol. Ges., Bd. 54. 



1903. Spencer, W., The hypostomic eyes of Trilobites. Geol. Mag., (4) Vol. 10. 



1906. Lorenz, Th., Beitrage zur Geologic und Palaontologie Ostasiens, II. Zeitschr. 



Deutsch. Geol. Ges., Bd. 58. (Untersuchungen iiber die Struktur der Trilobiten- 



schale.) 

 1909. Dollo, L., La paleontologie etologique. Bull. Soc. beige Geol., T. 23. 



1909. Jaekel, O., Ueber die Agnostiden. Zeitschr. Deutsch. Geol. Ges., Bd. 61. 



1910. Walcott, C., Cambrian Geology and Paleontology. No. 6. Olenellus and ol/n r 

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1911. v. Staff, H., tmd, H. Reck, Ueber die Lebensweise der Trilobiten. Sitz.-Ber. 

 nat. F'r. Berlin. 



1912. Walcott, C., Cambrian Geology and Paleontology, II. No. 6. Middle Cambrian 

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