weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 75 
432 Osborn (H. F.J. The evolution of teeth in Mammalia in its bear- 
ing upon the problem of phylogeny. 
N. Y. Acad. Sci., Trans., vol. xii, p. 187. 
Abstract: Am. Geol., vol. xiii, p. 357 (i p.). 
433 A division of the eutherian mammals into the Mesoplacentalia 
and Oenoplacentalia. 
N. Y. Acad. Sci., Trans., vol. xiii, pp. 234-237. 
Separates these mammals into two groups, one distinctive of the 
Mesozoic and the other of the Tertiary. 
433rt A new suborder of the Ancylopoda. 
Abstract: Am. Geol., vol. xiii, p. 357 (9 1.). 
Noticed in Bibliography and Index for 1892 and 1893. 
433/, and Wortman (J. L.). Fossil mammals of the Lower Mio- 
cene White River beds ; collection of 1892. 
Am. Mus. Nat. Hist., Bull., vol. vi, pp. 199-228, pis. ii-iii. 
Gives a table showing the succession of species in the White River 
Miocene. Describes new characters of Rhinoceroses, the osteology of 
Metamynodon, and the characters of Oreodon and Anthracotherium. 
P. 
434 Packard (R. L.). Variscite from Utah. 
Am. Jour. Sci., 3d ser., vol. xlvii, pp. 297-298. 
Abstract: Am. Nat., vol. xxviii, p. 873 (5 1.). 
Describes the characteristics of this material and gives its chemical 
analysis. 
435 Palache (Charles). The soda-rhyolite north of Berkeley, Oal. 
Univ. of Cal., Dept. of Geol., Bull., vol. i, pp. 61-72, pi. 5. 
Abstract: Am. Nat., vol. xxviii, p. 602 (£ p.). 
Describes the occurrence, geologic relations, and petrographic and 
chemical characteristics of a soda-rhyolite occurring in this vicinity. 
436 The lherzolite-serpentine and associated rocks of the Potrero, 
San Francisco, Oal. 
Univ. of Cal., Dept. of Geol., Bull., vol. i, pp. 161-180. 
Describes the outcrops and petrographic character of the serpentine 
and of an intrusive rock, and discusses their relations to the San Fran- 
cisco sandstone. 
437 On a rock from the vicinity of Berkeley [Oal.] containing a 
new soda amphibole. 
Univ. of Cal., Dept., of Geol., Bull., vol. i, pp. 181-192, pis. 10-11. 
Describes the minerals and secondary veins of the rock and the 
microscopic and chemical characters of the amphibole. 
438 Patton (Horace B.). Microscopic study of some Michigan rocks. 
Michigan, Report of State Board of Geol. Surv. for 1891-92, pp. 
184-186. 
Describes the general characters of the igneous rocks of Michigan, 
with special mention of diabase altered to kaolin and quartz, and of 
hornblende picrite. 
