CATALOGUE OF TRILOBITES. 323 



MICRO-DISCUS. 



BELLI-MARGINATUS Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 630, 



pi. 81, fig. 2, 2 a-b. Olenellus zone. 



CONNEXUS Wai., 1887; Am. Jour. Sci., 3d series, vol. 34, p. 194, pi. 1, 



figs. 4, 4 b. Washington Co., N. Y. Taconic. 



- CON-NEXUS Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 631, pi. 80, 



fig. 9, 9 a-b. Olenellus zone. 



DAWSON-I Hartt, 1868; Acadian Geol., p. 654, fig. 228. St. John, N. 



B. Mr. Hartt originally described this species under the new 

 generic name of Daicsonia, but on Mr. E. Billings' authority the 

 species was referred to Microdiscus in the Acadian Geol. Taconic. 



DAWSONI Whiteaves, 1878; Am. Jour.* Sci., 3d. series, vol. 16, p. 225. 



- DAWSONI Wai., 1884; Bull. U. S. Geol. Survey, No. 10, p. 23, pi. 2, 



figs. 3, 3 a. 



- DAWSONI Matt., 1855; Trans. Roy. Soc. Canada, vol. 3, p. 75, pi. 7, 



figs. 11 a-c. 

 HELENA Wai., 1889; Proc. Nat. Mus., vol. 12, p. 41. 



- HELENA Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 632, pi. 81, figs. 



1, la. Olenellus zone. 

 Agnostus LOBATUS Hall, 1847; Pal. New York, vol. 1, p. 258, pi. 67, 



figs. 5 a-f. One mile east of Troy, N. Y. Taconic. 



Agnostus LOBATUS Rogers, 1858; Geol. Survey Pennsylvania, vol. 2, 



p. 820, tig. 614 (1-4). 



- LOBATUS Ford, 1873; Am. Jour. Sci., 3d series, vol. 6, p. 135 (foot- 



note). 



- LOBATUS Wai., 1886; Bull. U. S. Geol. Survey, No. 30, p. 156, pi. 16, 



figs. 1, 1 a, b. Troy, N. Y. 



LOBATUS S. & F., 1888; Bull. Mus. Conip. Zool. Harvard Coll., vol. 



16, p. 36, pi. 2, fig. 13. 



- LOBATUS Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 632, pi. 81, figs. 



4 a-b. 



- MEEKI Ford, 1876; Am. Jour. Sci., 3d series, vol. 11, p. 371. Troy, 



N. y. Taconic. 



MEEKI Wai., 1886; Bull. U. S. Geol. Survey, No. 30, p. 155, pi. 16, 



fig. 4. 



- MEEKI Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 632, pi. 81, fig. 



3. Olenellus zone. 



- PARKERI Wai., 1886; Bull. U. S. Geol. Survey, No. 30, p. 157, pi. 16, 



figs. 2, 2 a. Township of Georgia, Vt. Taconic. 



- PAEKERI Wai., 1890; 10th Rep. U. S. Geol. Survey, p. 632, pi. 80, figs. 



7, 7 a. Olenellus zone. 



PULCHELLUS (Hartt MS.) Wai., 1884; Bull. U. S. Geol. Survey, No. 10, 



p. 24. RatclifFs Millstream, N. B.; Manuel's Brook, near Con- 

 ception Bay, N. F. Taconic. 



PUNCTATUS Salt., 1864; Quart. Jour. Geol. Soc. London, vol. 20, p. 



237, pi. 13, fig. 11. St. John, N. B. 



