72 BIBLIOGRAPHY AND INDEX OP N. A. GEOLOGY, [bull. 162. 
591 Osborn (Henry Fairfield). The origin of the Mammalia. 
Brit. Assoc. Adv. Sci., Rept., 1897, pp. 686-687; Am. Nat., vol. xxxii, 
pp. 309-334, 14 figs., 1898. 
Discusses the relations of the subdivisions of the Mammalia. 
592 Reconstruction and model of Phenacodus primaevus Cope. 
Brit. Assoc. Adv. Sci., Rept., 1897, p. 684 (£ p.), 1898. 
Gives a brief account of its relations. 
593 Origin of the Mammalia. 
Abstract, Science, new ser., vol. vii, pp. 176-178, 1898. 
Contains summary of paper read before the New York Academy of 
Sciences. 
594 A complete skeleton of Coryphodon radians. Notes upon the 
locomotion of this animal. 
Science, new ser., vol. vii, pp. 585-588, 1 fig., 1898. 
Describes new material from the Wasatch and Wind River beds, and 
reviews the literature of the genus. 
595 Models of extinct vertebrates. 
Science, new ser., vol. vii, pp. 841-845, 2 pis., 1898. 
596 Packard (Alpheus S.). A half century of evolution, with special 
reference to the effects of geological changes in animal life. 
Am. Assoc. Adv. Sci., Proc, vol. xlvii, pp. 311-356; Am. Nat., vol. 
xxxii, pp. 623-674; Science, new ser., vol. viii, pp. 243-257, 285-294, and 
316-323, 1898. 
597 Palmer (C. S.) and Stoddard (W. B.). The dike on the Columbia 
vein in Ward district, Boulder County, Colorado. 
Colo. Sci. Soc, Proc, vol. v, pp. 159-164, 1 fig., 1898. 
Describes the chemical and microscopic characters of the dike rock. 
598 Parker (Edward W.). Abrasive materials. 
U. S. Geol. Surv., 19th Ann. Rept., pt. vi (continued), pp. 515-533, 
1898. 
Includes statistics of production and notes on the occurrence of 
corundum in Ontario, by Courtenay De Kalb, and on the occurrence of 
pumicestone in Nebraska, South Dakota, and Utah. 
599 Fluorspar. 
U. S. Geol. Surv., 19th Ann. Rept., pt. vi (continued), pp. 613-617, 
1898. 
Includes statistics of production and notes on cryolite deposits of 
Greenland by H. S. Canby. 
600 Parsons (Charles Lathrop), Moses (Alfred J.), and. Elements of 
mineralogy, crystallography and blowpipe analysis. 
See Moses (A. J.) and Parsons (C. L.), No. 572. 
601 Patton (H. B.). Spherulites containing chalcedony and opal in 
Colorado. 
Colo. Sci. Soc, Proc, vol. v, pp. 165-170, 2 pis., 1898. 
See Bibliography and Index for 1896, No. 528. 
