weeks.] PALEONTOLOGY, PETEOLOGY, AND MINEEALOGY, 1901. 35 
240 Dresser (John A.). A preliminary note on an amygdaloidal trap 
rock in the eastern townships of the Province of Quebec. 
Ottawa Nat., vol. 14, pp. 180-182, 1901. 
Describes the megascopic and microscopic characters of the rock. 
241 On the petrography of Mt. Orford. 
Am. Geol., vol. 27, pp. 14-21, 1901. 
Describes occurrence and character of diabase, gabbro-diorite, serpen- 
tine, and ophicalcite, and gives a summary of the geologic history of 
the region. 
242 On the petrography of Shefford Mountain [Quebec ]. 
Am. Geol., vol. 28, pp. 204-213, pi. 21, 1901. 
Describes petrographic characters of essexite, nordmarkite, and 
pulaskite, and discusses their relations. 
243 Dryer (Charles R.). Certain peculiar eskers and esker lakes of 
northeastern Indiana. 
Jour. Geol., vol. 9, pp. 123-129, figs. 1-2, 1901. 
Describes glacial phenomena of the region. 
244 Lessons in physical geography. 
American Book Co., 1901. 
Review, Jour. Geol., vol. 9, pp. 638-681), 1901. 
245 Dumble (E. T.). Cretaceous of Obispo Canyon, Sonora, Mexico. 
Texas Acad. Sci., Trans., vol. 4, p. 81, 1901. 
Gives brief description of the character of the beds. 
246 Occurrence of oyster shells in volcanic deposits in Sonora, 
Mexico. 
Texas Acad. Sci., Trans., vol. 4, p. 82, 1901*. 
Gives brief description of occurrence. 
247 The iron ores of east Texas. 
Eng. & Mg. Jour., vol. 72, p. 104 (§ p.), 1901. 
Contains brief notes on the character of the ores. 
248 Geology of the Beaumont oil fields (Texas). 
Houston, Texas, June, 1901. (Not seen.) 
249 Dwight (W. B.). Fort Cassin beds in the Calciferous limestone 
of Dutchess County, New York. 
Abstract: Geol. Soc.Am., Bull., vol. 12, pp. 490 I'M. 1901. 
Contains notes on the faunas of these beds. 
E. 
250 Eakle (Arthur S.). Mineralogical notes, with chemical analyses 
by W. T. Schaller. 
Univ. of Cal., Dept. of Geol., Bull., vol. 2, pp. 315 326, pi. 9, L901 
Describes pectolite, zircon crystals, esmeraldaite, coquimbite, and 
altaite crystals. 
