weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1901. [)[) 
49(> Lindgren (Waldemar). Trias in northeastern Oregon. 
Abstract: Science, new ser., vol. 13, pp. 270-271, 1901. 
Describes briefly character and distribution. 
497 Rare minerals in gold quartz veins of eastern Oregon. 
Mg. and Sci. Press., vol. 82, p. 252, 1901. 
Gives a chemical analysis of roscoelite and notes on other minerals. 
498 Loomis (F. B.). On Jurassic stratigraphy in southeastern 
Wyoming. 
Am. Mus. Nat. Hist, Bull., vol. 14, pp. 189-197, pis. 26-27, 1901. 
Describes the geologic structure of the region and the character of 
the Jurassic and Cretaceous sediment of the region. 
499 Low (A. P.). Report on an exploration of part of the south 
shore of Hudson Strait and of Niagara Bay [Canada]. 
Can. Geol. Surv., new ser., vol. 11, Rept. L, 47 pp., 5 pis., L901. 
Published in 1899. 
Describes the physiography and crystalline rocks of the region. 
500 Lowry (J. D.). Mining in Lower California. 
Eng. & Mg. Jour., vol. 72, pp. 457-458, 1901. 
Containes notes on the occurrence of gold, silver, and copper ores. 
501 Lucas (Frederic A.). A new rhinoceros, Trigonias osborni, from 
the Miocene of South Dakota. 
U. S. Nat. Mus., Proc, vol. 23, pp. 221-223, figs. 1-2, 1901. 
502 A new dinosaur, Stegosaurus marshi, from the Lower Creta- 
ceous of South Dakota. 
U. S. Nat. Mus., Proc, vol. 23, pp. 291-292, pin. 23-24, 1901. 
503 The pelvic girdle of Zeuglodon, Basilosaurus cetoides(Owen), 
with notes on other portions of the skeleton. 
U. S. Nat. Mus., Proc, vol. 23, pp. 327-331, pis. 5-7, 1901. 
Includes section of the Zeuglodon beds. 
504 A new fossil Cyprinoid, Leuciscus turner i, from the Miocene 
of Nevada. 
U. S. Nat. Mus., Proc, vol. 23, pp. 333-334, V W. S, 1901. 
504a A flightless Auk, Mancalla californiensis, from the Miocene 
of California. 
U. S. Nat. Mus., Proc, vol. 24, pp. 133-134, 3 figs., 1901. 
505 Vertebrates from the Trias of Arizona. 
Science, new ser., vol. 14, p. 376, 1901. 
Describes briefly material recently collected. 
506 Lyon (D. A.). Serpentine marbles of Washington. 
Mines and Minerals, vol. 21, p. 349, 1901. 
Describes the character and occurrence of the serpentine 
