188 BULLETIN NO. 30, UNITED STATES NATIONAL MUSEUM. 



Page. 



M. corroboratus, n. a., 'Walcott, 1883, pLxvii,flg.6 4,210 



locrinus, Hall 4,210 



I. trentonensis, n. s., Walcott, 1883, pi. xvii, figs. 7,8 4-6,210-211 



Dendrocrinus, Hall 5,211 



n. retractilis, n. s., "Walcott, 1883, pL xvii, fig. 4 5,211 



Oalceocrinus, Hall 6,212 



O. barrandii, n. s., Walcott, 1883, pL xvii, figs. 1,2 6,212 



Metoptoma, Phillips 6,212 



M. billingsi, n. s., Walcott, 1883, pL xvii, figs. 12, 12 o 6-7, 212-213 



Beyrichia, McCoy 7, 213 



B. bella, n. s.. Walcott, 1883, pi. xvii, figs. 11, 11a 7,213 



ieperditia, Rouanlt 7,213 



Subgenus Igochilina, Jones 7,213 



S. {/«ocAiJino) armeto, n. 8., Walcott, 1883, pL xvii, fig. 10 7-8,213-214 



17. 



Walcott, C. D. Cambrian system of the United States and Canada. <Bull. Phil- 

 osophical Soc, Washington, vol. vi, pp. 97-102. Washington. 1884. 

 Separates were published in [December, 1883]. 



18. 



Walcott, C. D. Pre-carboniferons strata in the Grand CaSon of the Colorado, Ari- 

 zona. <;Amer. Jour. Sci., 3d ser., vol. xxvi, pp. 437-442, and p. 484. December. 

 New Haven, 1883. 



19. 



Walcott, C. D. Fresh-water shells from the Paleozoic Kocks of Nevada. < Science, 



vol. ii, pp. 808-809. December. Cambridge, 1883. 



Page. 



Zaptychius, n. g., Walcott, 1^83 , „ 808 



Zaptyehiua earbonaria, n. s, Walcott, 1883, flg.l 808 



PAj/ga pmca, n. s., Walcott, 1883, fig. 2 809 



AmpuUaria potoeKi, n. a., Walcott, 1883, fig. 3 , ^. 809 



20. 



Walcott, C. D. Appendages of the Trilobite. Notes on the original specimen de- 

 scribed by Prof. Mickleborough (Joum. Cincinnati Soc. Nat. Hist., vol. vi, p. 200, 

 1883). <Science, vol. iii, pp. 279-281, figs. 3. March. Cambridge, 1884. 



21. 



Walcott, C. D. Note on Paleozoic Eocka of Central Texas. <^Amer. Jour. Sci., 

 3d ser., vol. xxvii, pp. 431-433. December. New Haven, 1884. 



22. 



Walcott, C. D. Deer Creek Coal-field, White Mountain Indian Reservation, Ari- 

 zona. Report and Appendix. <|U. S. Senate Ex. Doc. No. 20, 48th Congress, 2d • 

 session, pp. 1-7. December. Washington, 1884. 



23. 



Walcott, C. D. Paleontology of the Eureka District. <Monograph viii, U. S. Geol. 

 Surv., pp. i-xiii, 1-298, pis. i-xxiv, figs. 1--7 in text. Washington, 1884. 



COMTENTO. 



Page. 



Letter of transmittal to Mr. Arnold Hague, by the author v 



Letter of transmittal to the director, by Mr. Arnold Hague vii 



Preface ix 



