392 AXXALS NEW YORK ACADEMY OF SCIENCES 



1867 



Observations ou the iaterual appendages of the genus Atrypa ; with a notio 

 of tlie discovery of a loop, connecting the spiral cones. 20th Ann. Rep. 

 X. Y. State Miis., pp. 141-144. 



1872 



[Remarks on the new crustacean lately discovered by the Hassler Expedi- 

 tion.] Proc. Albany Instit., I, pp. 322-324. 



With James Hall: Description of new species of fossils from the vicinity of 

 Louisville, Kentucky, and the Falls of the Ohio. 24:th Ann. Kept. N. Y. 

 State Miis. Nat. Hist., pp. 181-200o ; also published separately in 1872, in 

 advance of the 24th report, 13 pp. Albany. 



With James Hall: Remarks ou some peculiar impressions in sandstone of the 

 Chemung group. New York. 24:th Ann. Rept. N. Y. State Mus. Nat. Hist., 

 pp. 201-204, 1 text fig. 



1873 



With James Hall: Descriptions of new species of fossils from the Devonian 

 rocks of Iowa 23d Ann. Rep. N. Y. State Cabinet Nat. Hist., pp. 223-243, 

 pll. 9-13 ; also published separately July. 1872, in advance of the 23d 

 report, 21 pp., 4 pll. Albany. 



1875 



With James Hall : Descriptions of invertebrate fossils, mainly from the Silu- 

 rian system. Rep. Geol. Sitrv. Ohio, II, Part II. Paleontology, pp. 65- 

 157, pll. 1-10. 



With James Hall: Crinoids of the Genesee slate and Chemung group. Ibid., 

 pp. 158-161, pi. 13. 



With James Hall: Criuoidea of the Waverly group. Ibid., pp. 162-179, pll. 

 11, 12. 



Descriptions of new fossils. Pp. 103-104. with 1 pi. in William Ludlow's 

 "Report of a reconnaissance of the Black Hills of Dakota made in the 

 summer of 1874." 4°. Washington, D. C. 



Remarks on changes undergone by one of our fresh-water mollusks, showing 

 a tendency to specific variation. Proc. Albany Instit.. II, pp. 199-20L 



1876 



Descriptions of new species of fossils. Pp. 141-145, pll. 1. 2, in William Lud- 

 low's "Report of a reconnaissance from Carroll, Montana Territory, on 

 the upper Missouri, to the Yellowstone National Park, and return." 

 Made in the summer of 1875. 4°. Washington, D. C. 



1877 



Preliminary report on the paleontology of the Black Hills. 49 pp. Washing- 

 ton, 8°. 



With James Hall: Palaeontology. Pp. 107-302, pi. 7. in Clarence King's "U. S. 

 Geol. Exploration of the fortieth parallel." Vol. IV. 4°. Washington 

 D. C. 



