weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 71 
581 Orcutt (C. R.). Note on the occurrence of tourmalines in California. 
Abstracts, Am. Assoc. Adv. Sci., Proc, vol. xlvii, p. 306 (10 1.) ; Science, 
new ser., vol. viii, p. 505 (i p.) ; Am. Geol., vol. xxii, p. 265 (£ p.), 1898. 
582 Ordonez (Ezequiel). LesfilonsargentiferesdePachucafMexique]. 
Soc. Geol. cle France, Bull., vol. xxvi, pp. 234-258, 1898. 
Describes the physiography of the region, the character and occur- 
rence of the eruptive rocks, the fracture systems, and the origin and 
occurrence of the metalliferous deposits. 
583 Orton (Edward). What geology owes to the miner of coal. 
Ohio Mining Journal, No. 25, pp. 82-90, 1898. 
Gives a sketch of the early history of the science of geology. 
584 Geological probabilities as to petroleum. 
Geol. Soc. Am., Bull., vol. ix, pp. 85-100, 1898. 
Discusses the origin of petroleum and gas, the evidences of their 
ascending or descending in geologic formations, the dominant features 
in their accumulation, and the duration of their supply. 
585 Osborn (Henry Fairfield). Wasatch and Bridger beds in the 
Huerfano Lake basin. 
Abstract, Am. Assoc. Adv. Sci., Proc, vol. xlvi, pp. 205-206, 1898. 
Gives thickness of the Huerfano series and a summary of the conclu- 
sions of R. C. Hills regarding their occurrence and character. 
585a The extinct Rhinoceroses. 
Am. Mus. Nat. Hist., Mem., vol. i, Pt. Ill, pp. 79-164, pis. xiiA-xx, figs. 
1-47, 1898. 
Describes the morphology of the skull and teeth and the characters 
of a series of skulls from the White River beds. Includes a bibliography. 
586 - — A complete skeleton of Teleoceras fossiger. Notes upon the 
growth and sexual characters of this species. 
Am. Mus. Nat. Hist., Bull., vol. x, pp. 51-59, pis. iv-iv a ; Science, new 
ser., vol. 7, pp. 554-557, 1 fig., 1898. 
Describes occurrence and character of the material. 
587 A complete skeleton of Coryphodon radians. Notes upon loco- 
motion of this animal. 
Am. Mus. Nat. Hist., Bull., vol. x, pp. 81-91, pi. x, 2 figs., 1898. 
Describes occurrence and characters of the material. 
588 Remounted skeleton of Phenacodus prima^vus. Comparison 
with Euprotogonia. 
Am. Mus. Nat. His., Bull., vol. x, pp. 159-164, pl% xii, 4 figs., 1898. 
589 Evolution of the Amblypoda, Part I. Taligrada and Panto- 
donta. 
Am. Mus. Nat. Hist., Bull., vol. x, pp. 169-218, 29 figs., 1898. 
590 Additional characters of the great herbiverous dinosaur Cama- 
rasaurus. 
Am. Mus. Nat. Hist., Bull., vol. x, pp. 219-233, 13 figs., 1898. 
