98 
G03 Walcott (Charles Doolittle). [Correlation of clastic rocks.] 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 168-170. 
Remarks on the author's methods employed in the correlation of the 
Cambrian rocks of North America. 
604 Silurian vertebrate life at Canyon City [Colo.]. 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 427-428. • 
Gives a brief description of the character of the ichthyic fauna found 
in Silurian rocks in the vicinity of Canyon City, Colo. 
605 Itinerary, Niagara Falls to New York City. 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 459-463. 
Describes the geology along the railroad from Niagara Falls to New 
York City. 
606 [Terrestrial submergence southeast of the American Conti- 
nent.] 
Geol. Soc. Am., Bull., vol. v, p. 22 ($ p.). 
In discussion of paper by J. W. Spencer on the same subject. 
607 Paleozoic intraformational conglomerates. 
Geol. Soc Am., Bull., vol. v, pp. 191-198, pis. 5-7. 
Abstract: Am. Nat., vol. xxviii, p. 1023 (ip.). 
Gives a delinition of the term intraformational conglomerate and 
describes localities in Canada, Vermont, New York, Pennsylvania, and 
Tennessee where they occur, and discusses their origin. 
608 Geologic time, as indicated by the sedimentary rocks of North 
America. 
Am. Assoc. Adv. Sci., Proc, vol. xlii, pp. 129-169, with map of North 
America; Smith. Inst., Ann. Rept., 1892-93, pp. 301-334. 
Abstract: Am. Nat., vol. xxviii, pp. 793-794. 
Describes the growth and geographic conditions of the continent, 
the mode of formation and distribution of the deposits of the Cordil- 
leran sea. Discusses the duration of Paleozoic time, as indicated by 
mechanical and chemical sedimentation, and gives an estimate of the 
duration of the different periods of post-Archean time. 
609 Note on some appendages of the trilobites. 
Geol. Mag., dec. iv, vol. i, pp. 246-251, pi. viii. 
Abstracts: Am. Jour. Sci., 3d ser., vol. xlvii, p. 481 (£ p.); Am. Nat., 
vol. xxviii, p. 878 (/p.). 
Refers to the reeent discovery of the antenme of trilobites and com- 
pares them with the extremities of certain specimens of Ceraurus, 
Calymene, and Asaphus. 
609a The North American Continent during Cambrian time. 
Abstract: Am. Geol., vol. xiv, pp. 116-117. 
Noticed in Bibliography and Index for 1892 and 1893. 
610 Walker (T. L.). Notes on nickeliferous pyritefrom Murray mine, 
Sudbury, Ontario. 
Am. Jour. Sci., 3d ser., vol. xlvii, pp. 312-314. 
Describes this mineral and gives its chemical analysis. 
